16 Cool Upgrades For Honda Civic Si

Would you like to upgrade Honda Civic Si? Good news for you! Find inspiration below for building Honda Civic Si custom project.

Check out the list of aftermarket parts for Honda Civic Si performance upgrades and fine-tuning. Once installed, you'll get more power, making your Honda Civic Si faster.

Also, browse the accessories for refreshing the Civic Si's appearance, improving interior functionality, upgrading the stereo and infotainment system, boosting off-roading ability, enhancing visibility or safety, increasing the cargo space, and upping the towing capacity to haul bikes, kayaks, and other equipment.

On top of that, you may sort the Honda Civic Si upgrade suggestions by the installation difficulty, total budget (including the cost of installation and accessories), popularity among car enthusiasts, and level of hate.

Year

Brakes

Brake Rotors
Every day you accelerate your car to amazing speeds - but are you sure it can stop at the crucial moment? Are you confident in your brakes when you step on the gas? Don't forget that overheating causes your brake disks to deteriorate and they can't perform as well as they should. So if you're a fan of speed - make sure your brakes are a match for your powerful engine - replace your brake disks in time when they fall into disrepair.
- Installation difficulty: 5. "Medium, a bit of a brain teaser."
- Level of hate: 1. No one will even notice
  No one will even notice - These modifications you install only for yourself - people will not even notice that you have changed something. You won't disturb the public peace.
- Popularity: 71
- Average cost: $40 - 500
- Installation cost: $400 - 1200
Do you like this upgrade?

Interior

Steering Wheel Cover
How do you start and end each trip in your car? That's right, by holding on to the steering wheel. Did you know that continuous contact with your hands causes the steering wheel to deteriorate - cracks, scuffs and other signs of wear and tear that visually age it. To protect your car's steering wheel from premature wear and tear and customize it at the same time, install a steering wheel cover.
- Installation difficulty: 2. "Effortless, just like flipping a switch."
- Level of hate: 1. No one will even notice
  No one will even notice - These modifications you install only for yourself - people will not even notice that you have changed something. You won't disturb the public peace.
- Popularity: 64
Do you like this upgrade?
Floor Mats
You want to keep the interior of your car perfectly tidy and cozy even in snow, rain and slush, don't you? If yes - we advise you to think about the choice of quality floor mats. They not only collect all the dirt, preventing it from spreading around the cabin but also save you time in the process of cleaning. All you have to do is shake the mats out and rinse them with water - much easier than scrubbing dirt off the trim.
- Installation difficulty: 1. "Child's play, no sweat."
- Level of hate: 1. No one will even notice
  No one will even notice - These modifications you install only for yourself - people will not even notice that you have changed something. You won't disturb the public peace.
- Popularity: 48
- Average cost: $20 - 150
- Installation cost: $0 - 20
Do you like this upgrade?
Seat Covers
Want to keep your car seats in pristine condition? Well, there are two solutions for you - cover them with film, put the car in the garage and use public transportation, or buy seat covers. This simple invention will not only protect the interior of your car from dirt, debris, and damage but will also enhance its appearance.
- Installation difficulty: 2. "Effortless, just like flipping a switch."
- Level of hate: 2. It can hardly bother anyone
  It can hardly bother anyone - Consider this as wearing a bright outfit in public - someone will notice, and it will make someone smile, but hardly anyone will be against it.
- Popularity: 40
- Average cost: $20 - 80
- Installation cost: $0 - 30
Do you like this upgrade?
Custom Shift Knobs
Have you already modified your car in all sorts of ways, but you still miss the individuality? Try installing a custom shift knob; every look at it will make you smile. There is a huge variety of such accessories. A skull, a bullet, a billiard ball? No problem. Customize your car easily. You can choose such goods for both automatic and manual transmission cars.
- Installation difficulty: 3. "Easy-peasy, almost a cakewalk."
- Level of hate: 2. It can hardly bother anyone
  It can hardly bother anyone - Consider this as wearing a bright outfit in public - someone will notice, and it will make someone smile, but hardly anyone will be against it.
- Popularity: 26
- Average cost: $5 - 175
- Installation cost: $0 - 40
Do you like this upgrade?

Sound

Speakers
In the world of automotive audio, some say a symphony on wheels is the ultimate driving experience. These speakers aren’t just equipment; they're a ticket to an auditory grand prix. You haven’t truly felt the road's rhythm until these beauties belt out the tunes. Transform every drive into a concert; because, let’s face it, the world outside is just background noise.
- Installation difficulty: 7. "Difficult, needs a fair bit of time and patience."
- Level of hate: 3. Get ready to gather attention on the street
  Get ready to gather attention on the street - You will obviously be noticed. Mostly it will be enthusiastic glances seeing you off, perhaps even applause from other car guys. It is possible, however, that there will be people who do not like your changes and will express their dissatisfaction.
- Popularity: 53
- Average cost: $50 - 300
- Installation cost: $100 - 400
Do you like this upgrade?
Subwoofer
Do you have a powerful audio system, a great song is playing, but you still feel like something is out of place? Perhaps you are missing the right amount of volume? Install a powerful subwoofer and trust me, the sound will be powerful and deep - you'll hear every bass.
- Installation difficulty: 6. "Somewhat challenging, like a small hill to climb."
- Level of hate: 3. Get ready to gather attention on the street
  Get ready to gather attention on the street - You will obviously be noticed. Mostly it will be enthusiastic glances seeing you off, perhaps even applause from other car guys. It is possible, however, that there will be people who do not like your changes and will express their dissatisfaction.
- Popularity: 19
- Average cost: $150 - 2000
- Installation cost: $100 - 450
Do you like this upgrade?

Illumination

Headlights
Do not neglect your safety on the road - it is important not only to see what is happening in front of you but also to perform all steps to be visible to other drivers. Take care of your headlights - change a burned-out bulb in time or even consider installing brighter types of bulbs - this will not only allow you to see the road better but also allow you to personalize your vehicle - with a variety of bulb styles you can achieve a unique and distinctive design.
- Installation difficulty: 6. "Somewhat challenging, like a small hill to climb."
- Level of hate: 3. Get ready to gather attention on the street
  Get ready to gather attention on the street - You will obviously be noticed. Mostly it will be enthusiastic glances seeing you off, perhaps even applause from other car guys. It is possible, however, that there will be people who do not like your changes and will express their dissatisfaction.
- Popularity: 52
- Average cost: $80 - 700
- Installation cost: $150 - 450
Do you like this upgrade?
Light Bars
Have you already installed the most powerful and expensive bulbs on the market on your Honda Civic Si, but still you are not getting enough light? Install a light bar on your vehicle - it is an additional LED headlight with a powerful luminous flux. They will easily guide you through the darkest of nights!
- Installation difficulty: 6. "Somewhat challenging, like a small hill to climb."
- Level of hate: 4. Expect a strong public reaction (mostly negative)
  Expect a strong public reaction (mostly negative) - Okay, so that's the line you cross, be prepared to catch a wave of negativity. These modifications violate public peace or look too unconventional to be accepted. However, behave decently and don't break the rules, and then you may be able to avoid profanity in your address.
- Popularity: 33
- Average cost: $30 - 200
- Installation cost: $350 - 600
Do you like this upgrade?

Exhaust

Custom Mufflers
Not satisfied with the sound inside? Want everyone around you to know that you are the fastest and most powerful racer in the whole neighborhood? Install a custom muffler on your car and your ride will sing in a whole new way.
- Installation difficulty: 7. "Difficult, needs a fair bit of time and patience."
- Level of hate: 4. Expect a strong public reaction (mostly negative)
  Expect a strong public reaction (mostly negative) - Okay, so that's the line you cross, be prepared to catch a wave of negativity. These modifications violate public peace or look too unconventional to be accepted. However, behave decently and don't break the rules, and then you may be able to avoid profanity in your address.
- Popularity: 42
- Average cost: $100 - 1000
- Installation cost: $150 - 300
Do you like this upgrade?

Suspension

Wheel Spacers
Wheel spacers - how many things can be said about this invention and how little at the same time? Slap these bad boys on, and suddenly your ride's stance is wider, bolder, and dare I say, sexier. They're not just about looks though; they can also improve handling. In the grand tapestry of automotive tweaks, these are the spicy crisps at the bottom of the bag.
- Installation difficulty: 3. "Easy-peasy, almost a cakewalk."
- Level of hate: 1. No one will even notice
  No one will even notice - These modifications you install only for yourself - people will not even notice that you have changed something. You won't disturb the public peace.
- Popularity: 41
- Average cost: $85 - 150
- Installation cost: $100 - 250
Do you like this upgrade?
Coilovers
Behold, the epitome of suspension wizardry - Coilovers! Embrace the road like never before, as these babies transform your Honda Civic Si into a nimble beast, devouring twists and turns with the grace of a ballet dancer. Say goodbye to rough rides and hello to an all-American automotive thrill!
- Installation difficulty: 7. "Difficult, needs a fair bit of time and patience."
- Level of hate: 3. Get ready to gather attention on the street
  Get ready to gather attention on the street - You will obviously be noticed. Mostly it will be enthusiastic glances seeing you off, perhaps even applause from other car guys. It is possible, however, that there will be people who do not like your changes and will express their dissatisfaction.
- Popularity: 30
- Average cost: $300 - 450
- Installation cost: $200 - 350
Do you like this upgrade?

Performance

Cold Air Intakes
Well, this right here is what we call a game-changer, ladies and gentlemen - the Cold Air Intake! It's like giving your car a breath of fresh, icy air, waking up that slumbering engine and unleashing its full American muscle potential. Buckle up and get ready for a serious boost in performance and a symphony of power that'll make you want to take the long way home, every time!
- Installation difficulty: 3. "Easy-peasy, almost a cakewalk."
- Level of hate: 1. No one will even notice
  No one will even notice - These modifications you install only for yourself - people will not even notice that you have changed something. You won't disturb the public peace.
- Popularity: 38
- Average cost: $200 - 450
- Installation cost: $0 - 100
Do you like this upgrade?
Turbocharger
What could be more pleasant for a car enthusiast than the roar of the engine of his favorite ride? Perhaps that roar mixed with the whistle of a turbo. Install a turbocharger on your Honda Civic Si and get a pleasant power bonus - 10, 20, or even 100 horsepower - it all depends on the original engine performance!
- Installation difficulty: 8. "Quite tough, like a hard puzzle."
- Level of hate: 3. Get ready to gather attention on the street
  Get ready to gather attention on the street - You will obviously be noticed. Mostly it will be enthusiastic glances seeing you off, perhaps even applause from other car guys. It is possible, however, that there will be people who do not like your changes and will express their dissatisfaction.
- Popularity: 17
- Average cost: $400 - 5000
- Installation cost: $800 - 3200
Do you like this upgrade?
Throttle Body Spacers
Do you know what your car needs? This marvelous throttle body spacer! It'll punch your engine's performance right in the gut, giving you that extra grunt and growl you've been missing. Fit it in, and you'll feel like you've strapped a nitro boost to your accelerator!
- Installation difficulty: 3. "Easy-peasy, almost a cakewalk."
- Level of hate: 1. No one will even notice
  No one will even notice - These modifications you install only for yourself - people will not even notice that you have changed something. You won't disturb the public peace.
- Popularity: 9
- Average cost: $50 - 150
- Installation cost: $0 - 50
Do you like this upgrade?

Exterior

Fender Flares
Have you ever seen a sports car? Its streamlined shape, wide arches, and wheels protruding from underneath? The truth is that you can easily make your car look like that - install fender flares. They perform several functions at once - they make your car visually wider and also protect the paintwork of your car from dirt and small stones that fly from under the wheels.
- Installation difficulty: 5. "Medium, a bit of a brain teaser."
- Level of hate: 2. It can hardly bother anyone
  It can hardly bother anyone - Consider this as wearing a bright outfit in public - someone will notice, and it will make someone smile, but hardly anyone will be against it.
- Popularity: 22
- Average cost: $10 - 900
- Installation cost: $0 - 300
Do you like this upgrade?

How did we arrive at these ideas for customizing Honda Civic Si?

Our systems have analyzed many Honda Civic Si custom builds and singled out the most popular accessories and ideas.

Please upvote the ideas you would like to try! Share your experience with the community by showing off your Honda Civic Si with done upgrades.

Honda Civic Si specs
Compare

Performance

Engine

0-60 times

Horsepower

Upgrades

Exterior

Wheels

Wheel Interchange

Dimensions

Upgrades

Interior

Speakers size

Upgrades

Maintenance

Towing Capacity

Oil Capacity

Gas tank size

Battery size

Cargo space

Safety ratings

Generations

Upgrades

Manuals

Mpg

16 Cool Upgrades For Honda Civic Si

2022 Honda Civic Si Upgrades

Brakes

Brake Rotors

Interior

Steering Wheel Cover

Floor Mats

Seat Covers

Custom Shift Knobs

Sound

Speakers

Subwoofer

Illumination

Headlights

Light Bars

Exhaust

Custom Mufflers

Suspension

Wheel Spacers

Coilovers

Performance

Cold Air Intakes

Turbocharger

Throttle Body Spacers

Exterior

Fender Flares

How did we arrive at these ideas for customizing Honda Civic Si?

Honda Civic Si specs Compare

Performance

Exterior

Interior

Maintenance

Discussion

Honda Civic Si specs
Compare