28 Cool Modification Ideas for Cadillac CT4

What accessories can you install on your CT4?

Last Updated on 2025-08-22

The Cadillac CT4 is not just another luxury sedan - it is a machine built for drivers who crave a balance of refined elegance and raw performance. With sharp styling, a driver-focused cabin, and turbocharged power, this car is more than just a competitor to the BMW 3 Series and Mercedes-Benz C-Class - it is a unique blend of American engineering and high-performance potential.

But for those who demand more, the CT4 offers an incredible platform for customization. The right modifications can transform it into a track-ready beast, an aggressive street machine, or a head-turning showstopper. Whether you are looking for better handling, more horsepower, or a personalized aesthetic, upgrading the CT4 is about taking control of the driving experience and making it truly your own.

Why the Cadillac CT4 is a Modding Powerhouse

The CT4 is built with performance in mind, making it a favorite among enthusiasts who love to modify their rides. Its turbocharged engine lineup, advanced chassis, and available all-wheel drive provide a strong foundation for serious upgrades. Unlike some luxury sedans that resist modification, the CT4 is responsive to tuning, meaning small changes can lead to significant performance gains.

Why is the CT4 an ideal modding platform?

  • Turbocharged engines - The factory turbos provide great tuning potential for more horsepower.
  • Balanced handling - A well-engineered chassis means suspension mods make a big impact.
  • Distinctive styling - A few exterior tweaks can elevate the already aggressive design.
  • Performance pedigree - The CT4-V and Blackwing editions prove that this car is built for speed.

If you are looking for a vehicle that is ready to evolve with your vision, the Cadillac CT4 is the perfect starting point.

How We Compare Mods

Not all modifications are created equal. Some are easy to install and instantly effective, while others require advanced tuning and mechanical expertise. Here is how we break them down:

  • Installation Complexity - Some mods are simple bolt-ons, while others need professional installation.
  • DIY Difficulty - A rating based on how easy or difficult it is for an average car enthusiast to install.
  • Performance Impact - How much does the mod improve speed, handling, or responsiveness?
  • Aesthetic Factor - Does it enhance the car's look in a subtle or dramatic way?
  • Community Approval - Some mods are widely respected, while others are polarizing in the car scene.

By evaluating mods across these categories, we ensure that every upgrade is worth considering and matches your specific goals.

Top Mods to Unleash Your Cadillac CT4

1. Performance Tires - Maximum Grip, Precision Handling

Better traction, improved responsiveness, and enhanced cornering ability. Performance tires are the foundation for any serious build.

2. Cold Air Intake - Increased Airflow, More Power

A simple way to improve throttle response and efficiency. This mod enhances engine performance by optimizing airflow.

3. ECU Tune - Unlock Full Power Potential

Reprogramming the engine control unit increases horsepower, torque, and acceleration. A must-have for those seeking real performance gains.

4. Exhaust System - Aggressive Sound, Better Airflow

A high-performance exhaust enhances the car’s tone, reduces back pressure, and can improve power output.

5. Suspension Upgrades - Enhanced Handling, Sportier Stance

Lowering springs, coilovers, or sway bars provide sharper handling and a lower, more aggressive look.

6. Aesthetic Mods - Stand Out on the Road

  • Body Kits & Spoilers - Improve aerodynamics and give the CT4 an aggressive track-inspired appearance.
  • Custom Wheels - Lighter, sportier wheels enhance both the car’s look and performance.
  • Vinyl Wraps & Paint Protection - Add a personal touch while keeping the original paint pristine.
  • Interior Enhancements - Custom seats, lighting, and trim upgrades take the cabin to the next level.

The Road to Your Perfect CT4 Build Starts Here

Car modification is not just about speed or aesthetics - it is about personal expression. Every upgrade represents a decision to create something unique, something that reflects your personality and driving style. Whether you want a track weapon, a luxury cruiser, or a head-turning street machine, the CT4 is your perfect platform.

Now is the time to start your journey. Research your build, find the best upgrades, and take that first step toward a fully customized CT4. The road ahead is yours to conquer.

See Additions for Your Cadillac CT4

Jump to Specific Mod Category

Brakes


1. Brake Rotors
Popularity: 75

As brake discs wear out over their lifespan, timely replacement is crucial for ensuring safety. In addition, if you want to elevate your braking system's performance, you can install drilled or slotted brake rotors. Thanks to their unique design, they provide superior cooling, ensuring optimal braking even in demanding conditions.

Average Cost $40-$500

Installation Cost $400-$1200

DIY Difficulty 5 of 10. Medium

5 of 10. Medium, a bit of a brain teaser.

Level of Hate 1. No one will even notice

As brake discs wear out over their lifespan, timely replacement is crucial for ensuring safety. In addition, if you want to elevate your braking system's performance, you can install drilled or slotted brake rotors. Thanks to their unique design, they provide superior cooling, ensuring optimal braking even in demanding conditions.
Stop on a Dime with These Brake Rotors

Wheels And Tires


1. Rims
Popularity: 70

Sometimes, the right rims can transform your car more than any other modification. If you have a sophisticated ride that looks like it belongs on a magazine cover, the perfect rims will accentuate its style. Or, if there's a flaw you'd like to hide, stunning rims can draw attention away from imperfections. Beautiful rims are always a smart choice to elevate your car's appearance and make it stand out on the road.

Average Cost $220-$500

Installation Cost $120

DIY Difficulty 4 of 10. Manageable

4 of 10. Manageable, just needs a bit of focus.

Level of Hate 3. Get ready to gather attention on the street

Sometimes, the right rims can transform your car more than any other modification. If you have a sophisticated ride that looks like it belongs on a magazine cover, the perfect rims will accentuate its style. Or, if there's a flaw you'd like to hide, stunning rims can draw attention away from imperfections. Beautiful rims are always a smart choice to elevate your car's appearance and make it stand out on the road.
Rims

2. Wheel Center Caps
Popularity: 45

Frequently underestimated because of their size, center caps are undeniably badass from a visual perspective. The first impression people get from your wheels will be positive, due to the caps giving your wheels a finished (no unsightly bolts or rusted pieces left uncovered) appearance. These caps serve the dual purpose of retaining the style while protecting against dirt and grime, making them evolutionary in nature. Set them with stock or deep-dish wheels and you will send the message to everyone else on the road that you take no nonsense when it comes to style. Do center caps make a bold statement? No. And that’s the beauty of it. Details bring life to a freshly detailed and put together car, alongside giving it a cleaner appearance when set on a center cap.

Average Cost $10-$87

Installation Cost $1-$5

DIY Difficulty 1 of 10. Child's play

1 of 10. Child's play, no sweat.

Level of Hate 2. It can hardly bother anyone

Frequently underestimated because of their size, center caps are undeniably badass from a visual perspective. The first impression people get from your wheels will be positive, due to the caps giving your wheels a finished (no unsightly bolts or rusted pieces left uncovered) appearance. These caps serve the dual purpose of retaining the style while protecting against dirt and grime, making them evolutionary in nature. Set them with stock or deep-dish wheels and you will send the message to everyone else on the road that you take no nonsense when it comes to style. Do center caps make a bold statement? No. And that’s the beauty of it. Details bring life to a freshly detailed and put together car, alongside giving it a cleaner appearance when set on a center cap.
Center Caps

Interior


1. Phone Holders
Popularity: 68

Feeling the need to stay connected, even while on the move? We get it, but juggling your phone while driving is not just frustrating—it's hazardous and could lead to serious accidents. The solution? A sleek phone holder. This compact accessory occupies minimal space, yet offers the perfect spot for your smartphone. With it, you can effortlessly access your device without the distraction of figuring out where to place it.

Average Cost $2-$24

Installation Cost $1

DIY Difficulty 1 of 10. Child's play

1 of 10. Child's play, no sweat.

Level of Hate 1. No one will even notice

Feeling the need to stay connected, even while on the move? We get it, but juggling your phone while driving is not just frustrating—it's hazardous and could lead to serious accidents. The solution? A sleek phone holder. This compact accessory occupies minimal space, yet offers the perfect spot for your smartphone. With it, you can effortlessly access your device without the distraction of figuring out where to place it.

2. Steering Wheel Cover
Popularity: 67

As time passes, your car's steering wheel can start to show its age, manifesting wear and tear through scratches, cracks, and breaks, all of which diminish the car's interior aesthetics. To prevent this, use a steering wheel cover. Whenever the cover starts looking aged or worn, simply replace it to reveal the well-preserved steering wheel beneath.

Average Cost $10-$100

Installation Cost $30

DIY Difficulty 2 of 10. Effortless

2 of 10. Effortless, just like flipping a switch.

Level of Hate 1. No one will even notice

As time passes, your car's steering wheel can start to show its age, manifesting wear and tear through scratches, cracks, and breaks, all of which diminish the car's interior aesthetics. To prevent this, use a steering wheel cover. Whenever the cover starts looking aged or worn, simply replace it to reveal the well-preserved steering wheel beneath.
Enjoy Firm Grip with Steering Wheel Cover

3. Window Tint
Popularity: 60

Are you seeking enhanced privacy and comfort in your car? Imagine driving without the glare of the sun hindering your vision or curious eyes invading your personal space. This isn't just a dream—it's what you get with our premium window tinting! With a range of options from subtle shading to complete darkness, our tints are customizable to suit your unique needs and preferences. Don't let another day of discomfort and distraction pass you by. Choose the perfect tint for your car today and experience the difference!

Average Cost $50-$500

Installation Cost $150

DIY Difficulty 4 of 10. Manageable

4 of 10. Manageable, just needs a bit of focus.

Level of Hate 2. It can hardly bother anyone

Are you seeking enhanced privacy and comfort in your car? Imagine driving without the glare of the sun hindering your vision or curious eyes invading your personal space. This isn't just a dream—it's what you get with our premium window tinting! With a range of options from subtle shading to complete darkness, our tints are customizable to suit your unique needs and preferences. Don't let another day of discomfort and distraction pass you by. Choose the perfect tint for your car today and experience the difference!

4. Backup Cameras
Popularity: 53

A backup camera can be a real game-changer for drivers who want a bit more peace of mind when parking or reversing. With a clear, real-time view of what's directly behind your vehicle, it becomes much easier to spot obstacles that are hard to see with mirrors alone. Whether it's a curb, a small object, or even a person walking by, the camera helps reduce blind spots that can make reversing tricky. Many people find that using a backup camera adds a layer of safety, especially in tight spaces or busy areas. The camera’s view on your dashboard gives you an extra set of "eyes" in those moments when it’s tough to see everything around you. It’s especially helpful for larger vehicles with limited rear visibility but can be equally valuable for any car by making daily drives and parking just that bit more comfortable.

Average Cost $50-$325

Installation Cost $50-$200

DIY Difficulty 7 of 10. Difficult

7 of 10. Difficult, needs a fair bit of time and patience.

Level of Hate 2. It can hardly bother anyone

A backup camera can be a real game-changer for drivers who want a bit more peace of mind when parking or reversing. With a clear, real-time view of what's directly behind your vehicle, it becomes much easier to spot obstacles that are hard to see with mirrors alone. Whether it's a curb, a small object, or even a person walking by, the camera helps reduce blind spots that can make reversing tricky. Many people find that using a backup camera adds a layer of safety, especially in tight spaces or busy areas. The camera’s view on your dashboard gives you an extra set of "eyes" in those moments when it’s tough to see everything around you. It’s especially helpful for larger vehicles with limited rear visibility but can be equally valuable for any car by making daily drives and parking just that bit more comfortable.
Backup Cameras

5. Floor Mats
Popularity: 49

Floor mats are essential items for every car. They protect the interior from dirt and debris - rinse them with water, and your car is clean and tidy again. And with an array of designs and hues available, these mats offer a wonderful opportunity to infuse a touch of your personality into your vehicle's interior.

Average Cost $20-$150

Installation Cost $20

DIY Difficulty 1 of 10. Child's play

1 of 10. Child's play, no sweat.

Level of Hate 1. No one will even notice

Floor mats are essential items for every car. They protect the interior from dirt and debris - rinse them with water, and your car is clean and tidy again. And with an array of designs and hues available, these mats offer a wonderful opportunity to infuse a touch of your personality into your vehicle's interior.
See Floor Mats Your Vehicle Wishes It Had

6. Dash Cameras
Popularity: 47

Enhance your driving experience and stay secure with a dashboard camera, the smart choice for any driver. This essential gadget captures every moment on the road, providing clear, high-definition footage of your journey. Whether you're documenting a scenic drive or gathering crucial evidence in case of an accident, a dashboard camera is your trusted companion. Easy to install and use, it offers peace of mind with features like night vision, wide-angle lenses, and loop recording.

Average Cost $36-$200

Installation Cost $80-$140

DIY Difficulty 5 of 10. Medium

5 of 10. Medium, a bit of a brain teaser.

Level of Hate 1. No one will even notice

Enhance your driving experience and stay secure with a dashboard camera, the smart choice for any driver. This essential gadget captures every moment on the road, providing clear, high-definition footage of your journey. Whether you're documenting a scenic drive or gathering crucial evidence in case of an accident, a dashboard camera is your trusted companion. Easy to install and use, it offers peace of mind with features like night vision, wide-angle lenses, and loop recording.

7. Seat Covers
Popularity: 41

As car seats naturally age, they can become cracked, scuffed, and visibly worn. Use seat covers to prevent this and extend the life of your interior. Not only are they effective, but they're also stylish - with an array of chic colors and patterns available, you'll effortlessly find a design that resonates with your taste.

Average Cost $20-$80

Installation Cost $30

DIY Difficulty 2 of 10. Effortless

2 of 10. Effortless, just like flipping a switch.

Level of Hate 2. It can hardly bother anyone

As car seats naturally age, they can become cracked, scuffed, and visibly worn. Use seat covers to prevent this and extend the life of your interior. Not only are they effective, but they're also stylish - with an array of chic colors and patterns available, you'll effortlessly find a design that resonates with your taste.
Revitalize Interior Space with Stylish Seat Covers

8. Custom Shift Knobs
Popularity: 27

If you want to personalize the interior of your car, install a custom shift knob. A pool ball, a skull, a katana handle - the choices are limited only by your imagination. Before making a purchase, ensure the threads of the part align with those of your shift knob.

Average Cost $5-$175

Installation Cost $40

DIY Difficulty 3 of 10. Easy-peasy

3 of 10. Easy-peasy, almost a cakewalk.

Level of Hate 2. It can hardly bother anyone

If you want to personalize the interior of your car, install a custom shift knob. A pool ball, a skull, a katana handle - the choices are limited only by your imagination. Before making a purchase, ensure the threads of the part align with those of your shift knob.
Get Hold on Power with Custom Shift Knobs

9. Center Consoles
Popularity: 24

Give your car a little upgrade with a center console! It's a nifty addition that helps keep your stuff neatly organized while you're on the road, and it even acts as a comfy armrest for those longer drives. Installing a center console is a simple, straightforward way to make your car feel a bit more like home.

Average Cost $30-$75

Installation Cost $10-$150

DIY Difficulty 4 of 10. Manageable

4 of 10. Manageable, just needs a bit of focus.

Level of Hate 1. No one will even notice

Give your car a little upgrade with a center console! It's a nifty addition that helps keep your stuff neatly organized while you're on the road, and it even acts as a comfy armrest for those longer drives. Installing a center console is a simple, straightforward way to make your car feel a bit more like home.
Center Console

Sound


1. Speakers
Popularity: 53

Good music is an essential part of a pleasant car ride. Upgrading or adding speakers is a surefire way to enhance sound quality. Choose products powerful enough for your needs, but always prioritize high quality to ensure there's no unwanted noise or interference compromising the auditory experience.

Average Cost $50-$300

Installation Cost $100-$400

DIY Difficulty 7 of 10. Difficult

7 of 10. Difficult, needs a fair bit of time and patience.

Level of Hate 3. Get ready to gather attention on the street

Good music is an essential part of a pleasant car ride. Upgrading or adding speakers is a surefire way to enhance sound quality. Choose products powerful enough for your needs, but always prioritize high quality to ensure there's no unwanted noise or interference compromising the auditory experience.
Elevate Sound Quality with Premium Speakers

2. Subwoofers
Popularity: 24

If you want to really feel your favorite tunes and make every drive more enjoyable, a subwoofer is definitely worth considering. A subwoofer is a speaker that focuses on delivering deep, low-frequency sounds, boosting the bass in your car’s audio. Adding a subwoofer to your ride can make your music feel more powerful and vibrant, giving you that rich, full sound you’re after.

Average Cost $100-$350

Installation Cost $50-$200

DIY Difficulty 7 of 10. Difficult

7 of 10. Difficult, needs a fair bit of time and patience.

Level of Hate 3. Get ready to gather attention on the street

If you want to really feel your favorite tunes and make every drive more enjoyable, a subwoofer is definitely worth considering. A subwoofer is a speaker that focuses on delivering deep, low-frequency sounds, boosting the bass in your car’s audio. Adding a subwoofer to your ride can make your music feel more powerful and vibrant, giving you that rich, full sound you’re after.
Subwoofers

3. Amplifier
Popularity: 18

Turn up the vibe in your ride with a cool amplifier that cranks up your music's clarity and oomph. This little upgrade works magic on your car's sound system, making your favorite tunes sound better with deeper bass and clearer highs. Pop in an amplifier and get ready for road trips and commutes filled with awesome music that sounds just right.

Average Cost $50-$340

Installation Cost $100-$430

DIY Difficulty 7 of 10. Difficult

7 of 10. Difficult, needs a fair bit of time and patience.

Level of Hate 3. Get ready to gather attention on the street

Turn up the vibe in your ride with a cool amplifier that cranks up your music's clarity and oomph. This little upgrade works magic on your car's sound system, making your favorite tunes sound better with deeper bass and clearer highs. Pop in an amplifier and get ready for road trips and commutes filled with awesome music that sounds just right.

Illumination


1. Headlights
Popularity: 51

If your headlights become dim, clouded, or show signs of damage, the best choice is to replace them. For an upgrade, consider installing advanced lensed or diode headlights - it not only elevates your car's look but also significantly boosts visibility during nighttime drives.

Average Cost $80-$700

Installation Cost $150-$450

DIY Difficulty 6 of 10. Somewhat challenging

6 of 10. Somewhat challenging, like a small hill to climb.

Level of Hate 3. Get ready to gather attention on the street

If your headlights become dim, clouded, or show signs of damage, the best choice is to replace them. For an upgrade, consider installing advanced lensed or diode headlights - it not only elevates your car's look but also significantly boosts visibility during nighttime drives.
See Like an Owl on Steroids with LED Headlights

2. Light Bars
Popularity: 32

In situations where enhanced illumination is required and standard headlights fall short, a light bar becomes invaluable. This device uses high-power diodes as a light source and can be used either with headlights or independently. Depending on the size and shape, the power of these devices differs; they are very popular among off-roaders and are the go-to tool when you need a clear, comprehensive view of the terrain to navigate safely.

Average Cost $30-$200

Installation Cost $350-$600

DIY Difficulty 6 of 10. Somewhat challenging

6 of 10. Somewhat challenging, like a small hill to climb.

Level of Hate 4. Expect a strong public reaction (mostly negative)

In situations where enhanced illumination is required and standard headlights fall short, a light bar becomes invaluable. This device uses high-power diodes as a light source and can be used either with headlights or independently. Depending on the size and shape, the power of these devices differs; they are very popular among off-roaders and are the go-to tool when you need a clear, comprehensive view of the terrain to navigate safely.
Turn Night into Day Off-Road with Light Bars

Exterior


1. Cargo Racks
Popularity: 48

If you have been on a long trip and struggled with trunk space, then you are in luck; cargo racks should do the trick. In conjunction with other types of racks, they give passengers more space and comfort in the car while allowing for the transport of bigger items that would otherwise not fit. It can also be useful in other scenarios like an off road trip, camping, or simple errands. Utilizing those will also aid in reducing clutter which can help in reducing distractions while driving. Cargo racks are tough external storage systems, either mounted to the roof or rear of your vehicle for added storage and flexibility when looking to pack additional items such as luggage, camping gear, bikes, kayaks, and snowboards which these racks can hold. They come in a lot of different types like roof racks, basket style racks, and hitch mounted tiers, which are made out of aluminum or steel, so they can last longer against the weather. These racks also include tie down points or rails, which make the items safe and wont get damaged by rough roads or long road trips. In addition to making more space, car racks make your car more useful and functional. They make your vehicle seem like it is ready for an adventure by being able to carry additional gear and keep the interior roomy. For someone who loves being outside, loading in sports equipment is super easy, but for the everyday driver, it helps manage large loads. A properly secured rack will help keep the items from moving around the car which can be very dangerous in the case of a sudden stop. In addition, some racks can greatly enhance the look of the car by adding a sporty, rugged look. Overall, cargo racks are an easy way to make your car more practical and stylish for any journey.

Average Cost $75-$280

Installation Cost $50-$125

DIY Difficulty 6 of 10. Somewhat challenging

6 of 10. Somewhat challenging, like a small hill to climb.

Level of Hate 2. It can hardly bother anyone

If you have been on a long trip and struggled with trunk space, then you are in luck; cargo racks should do the trick. In conjunction with other types of racks, they give passengers more space and comfort in the car while allowing for the transport of bigger items that would otherwise not fit. It can also be useful in other scenarios like an off road trip, camping, or simple errands. Utilizing those will also aid in reducing clutter which can help in reducing distractions while driving. Cargo racks are tough external storage systems, either mounted to the roof or rear of your vehicle for added storage and flexibility when looking to pack additional items such as luggage, camping gear, bikes, kayaks, and snowboards which these racks can hold. They come in a lot of different types like roof racks, basket style racks, and hitch mounted tiers, which are made out of aluminum or steel, so they can last longer against the weather. These racks also include tie down points or rails, which make the items safe and wont get damaged by rough roads or long road trips. In addition to making more space, car racks make your car more useful and functional. They make your vehicle seem like it is ready for an adventure by being able to carry additional gear and keep the interior roomy. For someone who loves being outside, loading in sports equipment is super easy, but for the everyday driver, it helps manage large loads. A properly secured rack will help keep the items from moving around the car which can be very dangerous in the case of a sudden stop. In addition, some racks can greatly enhance the look of the car by adding a sporty, rugged look. Overall, cargo racks are an easy way to make your car more practical and stylish for any journey.
Cargo Racks

2. Fender Flares
Popularity: 24

Fender flares safeguard your car from mechanical hazards like small stones and branches. By snugly fitting over the fenders and arches, they shield both the paint and the metal underneath. As a bonus, they improve the appearance of the car, making it visually wider and more aggressive.

Average Cost $10-$900

Installation Cost $300

DIY Difficulty 5 of 10. Medium

5 of 10. Medium, a bit of a brain teaser.

Level of Hate 2. It can hardly bother anyone

Fender flares safeguard your car from mechanical hazards like small stones and branches. By snugly fitting over the fenders and arches, they shield both the paint and the metal underneath. As a bonus, they improve the appearance of the car, making it visually wider and more aggressive.
Add Muscle to Your Vehicle with Fender Flares

3. Decals
Popularity: 23

Looking to create the ultimate talking point by adding your own personal touch to your car? If so, you may want to consider using decals. Regardless of whether you prefer a sporty, aggressive appearance or a sleek custom look, these decals are a budget-friendly alternative that allows for styling in many diverse ways. No matter how dramatic the racing stripes or how complex the design, it will always be one of a kind! However, if you think that these decals are purely for style, you are mistaken! These can also help in spinning attention to certain features, representing different organizations, or sometimes even preventing wear and tear to the paint caused by the sun. And high quality decals can be produced with quality materials so that in terms of rain, wind, and sun you will not make any deterioration as well. What is one of the best things about decals? They are quick to put on, and if you don’t want them on in the future they are equally as easy to take off. No need for permanently altering anything—just a quick modification you don’t even need to feel hooked to. In everyday traffic and at a meet, these decals will help change people's perception of your car. And there’s no need to consider them only as decoration - through the banners the drivers declare their territory!

Average Cost $2-$100

Installation Cost $50

DIY Difficulty 1 of 10. Child's play

1 of 10. Child's play, no sweat.

Level of Hate 3. Get ready to gather attention on the street

Looking to create the ultimate talking point by adding your own personal touch to your car? If so, you may want to consider using decals. Regardless of whether you prefer a sporty, aggressive appearance or a sleek custom look, these decals are a budget-friendly alternative that allows for styling in many diverse ways. No matter how dramatic the racing stripes or how complex the design, it will always be one of a kind! However, if you think that these decals are purely for style, you are mistaken! These can also help in spinning attention to certain features, representing different organizations, or sometimes even preventing wear and tear to the paint caused by the sun. And high quality decals can be produced with quality materials so that in terms of rain, wind, and sun you will not make any deterioration as well. What is one of the best things about decals? They are quick to put on, and if you don’t want them on in the future they are equally as easy to take off. No need for permanently altering anything—just a quick modification you don’t even need to feel hooked to. In everyday traffic and at a meet, these decals will help change people's perception of your car. And there’s no need to consider them only as decoration - through the banners the drivers declare their territory!
Decals

4. Grilles
Popularity: 19

Looking to make your car stand out? Upgrade it with a custom grille! Whether you choose a sleek design from a newer generation or a distinctive, one-of-a-kind style, a custom grille will give your car a fresh, unique look that turns heads wherever you go.

Average Cost $70-$165

Installation Cost $10-$50

DIY Difficulty 5 of 10. Medium

5 of 10. Medium, a bit of a brain teaser.

Level of Hate 2. It can hardly bother anyone

Looking to make your car stand out? Upgrade it with a custom grille! Whether you choose a sleek design from a newer generation or a distinctive, one-of-a-kind style, a custom grille will give your car a fresh, unique look that turns heads wherever you go.
Grilles

5. Bull Bars
Popularity: 8

This rugged addition is designed to shield your car from damage during off-road adventures and unexpected impacts. A bull bar provides an extra layer of defense, safeguarding your vehicle's grille, bumper, and headlights from debris, rocks, and minor collisions. Beyond its protective benefits, a bull bar adds a bold, aggressive look to your car, making it stand out on any terrain. Many models also come with mounting points for additional accessories like LED lights, giving you improved visibility during nighttime or low-light conditions.

Average Cost $130-$235

Installation Cost $70-$120

DIY Difficulty 5 of 10. Medium

5 of 10. Medium, a bit of a brain teaser.

Level of Hate 2. It can hardly bother anyone

This rugged addition is designed to shield your car from damage during off-road adventures and unexpected impacts. A bull bar provides an extra layer of defense, safeguarding your vehicle's grille, bumper, and headlights from debris, rocks, and minor collisions. Beyond its protective benefits, a bull bar adds a bold, aggressive look to your car, making it stand out on any terrain. Many models also come with mounting points for additional accessories like LED lights, giving you improved visibility during nighttime or low-light conditions.
Bull Bars

Suspension


1. Wheel Spacers
Popularity: 43

Wheel spacers provide a means to fine-tune the wheel offset of your car, essential for accommodating rims outside the standard parameters. Available in an array of thicknesses and materials, it's simply a matter of selecting a spacer that aligns with your vehicle's bolt pattern and center bore.

Average Cost $85-$150

Installation Cost $100-$250

DIY Difficulty 3 of 10. Easy-peasy

3 of 10. Easy-peasy, almost a cakewalk.

Level of Hate 1. No one will even notice

Wheel spacers provide a means to fine-tune the wheel offset of your car, essential for accommodating rims outside the standard parameters. Available in an array of thicknesses and materials, it's simply a matter of selecting a spacer that aligns with your vehicle's bolt pattern and center bore.
Enhance Stability by Widening Stance with Wheel Spacers

2. Coilovers
Popularity: 29

If you're keen on customizing your car's ground clearance, coilovers are an ideal choice. Designed to replace stock shock absorbers, they come with an adjustable locking nut. For a lower stance, simply tighten the nut. If you prefer a raised profile, just loosen it, and watch your car elevate.

Average Cost $300-$450

Installation Cost $200-$350

DIY Difficulty 7 of 10. Difficult

7 of 10. Difficult, needs a fair bit of time and patience.

Level of Hate 3. Get ready to gather attention on the street

If you're keen on customizing your car's ground clearance, coilovers are an ideal choice. Designed to replace stock shock absorbers, they come with an adjustable locking nut. For a lower stance, simply tighten the nut. If you prefer a raised profile, just loosen it, and watch your car elevate.
Improve Handling with Adjustable Coilovers

Exhaust


1. Custom Mufflers
Popularity: 42

If you want to achieve a unique sound from your engine, you should consider installing a custom muffler. The design you choose can produce anything from a subtle purr to a deep, resonant bass, allowing you to tailor the sound to your preference. Before making a purchase, make sure the diameter of the muffler matches your tailpipe and that you're not violating the noise level allowed by state law - after all, who wants unnecessary run-ins with the law or irritated neighbors?

Average Cost $100-$1000

Installation Cost $150-$300

DIY Difficulty 7 of 10. Difficult

7 of 10. Difficult, needs a fair bit of time and patience.

Level of Hate 4. Expect a strong public reaction (mostly negative)

If you want to achieve a unique sound from your engine, you should consider installing a custom muffler. The design you choose can produce anything from a subtle purr to a deep, resonant bass, allowing you to tailor the sound to your preference. Before making a purchase, make sure the diameter of the muffler matches your tailpipe and that you're not violating the noise level allowed by state law - after all, who wants unnecessary run-ins with the law or irritated neighbors?
Make Your Car Roar, Not Whimper with Custom Muffler

Performance


1. Cold Air Intakes
Popularity: 38

A cold air intake is an affordable way to improve your vehicle's performance. It mounts in place of a standard air filter and channels cooler air directly into the engine's combustion chamber. This cooler air, being richer in oxygen, optimizes the combustion process within the cylinders, ultimately leading to increased power.

Average Cost $200-$450

Installation Cost $100

DIY Difficulty 3 of 10. Easy-peasy

3 of 10. Easy-peasy, almost a cakewalk.

Level of Hate 1. No one will even notice

A cold air intake is an affordable way to improve your vehicle's performance. It mounts in place of a standard air filter and channels cooler air directly into the engine's combustion chamber. This cooler air, being richer in oxygen, optimizes the combustion process within the cylinders, ultimately leading to increased power.
Install Cold Air Intakes to Boost Horsepower

2. Turbocharger
Popularity: 18

A turbocharger can significantly boost your engine's power by channeling additional air into the combustion chambers. This process results in more fuel being combusted per stroke, leading to heightened power. Remember: installing a turbocharger is a demanding process that requires extensive tweaking and calibration to keep the system running smoothly and without difficulties.

Average Cost $400-$5000

Installation Cost $800-$3200

DIY Difficulty 8 of 10. Quite tough

8 of 10. Quite tough, like a hard puzzle.

Level of Hate 3. Get ready to gather attention on the street

A turbocharger can significantly boost your engine's power by channeling additional air into the combustion chambers. This process results in more fuel being combusted per stroke, leading to heightened power. Remember: installing a turbocharger is a demanding process that requires extensive tweaking and calibration to keep the system running smoothly and without difficulties.
Maximize Speed with Turbo Charger Upgrade

3. Throttle Body Spacers
Popularity: 9

A throttle body spacer is a budget-friendly way to increase engine power. Positioned in front of the throttle body, it augments the volume of air channeled into the combustion chamber. This optimization not only enhances combustion but also boosts the horsepower beneath the hood.

Average Cost $50-$150

Installation Cost $50

DIY Difficulty 3 of 10. Easy-peasy

3 of 10. Easy-peasy, almost a cakewalk.

Level of Hate 1. No one will even notice

A throttle body spacer is a budget-friendly way to increase engine power. Positioned in front of the throttle body, it augments the volume of air channeled into the combustion chamber. This optimization not only enhances combustion but also boosts the horsepower beneath the hood.
Unlock Hidden Power with Throttle Body Spacers

Cadillac CT4 Upgrades Report

  • The total cost of all these 2023 Cadillac CT4 upgrades averages around $22 547, including cost of installation.

  • The average cost of parts alone would be around $13 486.

  • If you choose to install upgrades by yourself you may save from $500 (on easy mods) to $1000 (includes hard level mods).

  • The suggested ideas include 9 mods with a low level of hate from non-tuners.

  • There are 6 upgrades requiring medium level of mechanical background to install.

Description of terms

  • Popularity shows the percent of enthusiasts installing this particular mod.

  • Installation difficulty resembles the level of mechanical expertise required.

  • Average cost comprises the estimated cost of goods and average cost of installation.

  • Cost of installation indicates the average price you may pat the mechanic.

  • Level of hate is how much ordinary people dislike or may be complaining about this mod. For instance, Bi-Xenon headlights may blind the oncoming drivers.

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