Civic Si Customization Kansas City
Kansas City's Honda Civic Si customization specialists — exhaust, wheels, intake, intercooler, suspension, audio, and tuning for 11th gen and 10th gen Si owners.
Honda Civic Si Customization in Kansas City
American Fusion Wheels is the Kansas City metro's destination for Honda Civic Si customization. Whether you own an 11th gen (FE, 2022+) or 10th gen (FC, 2017-2021), we know the L15B7 1.5L turbo-four platform thoroughly. The Si produces 200 HP from the factory and responds exceptionally well to bolt-on modifications — exhaust, intake, intercooler, and a tune can push the Si well past 250 WHP for a fraction of what a Type R costs. Our Shawnee, KS shop handles exhaust, wheels, intake, suspension, audio, and appearance work on every generation of the Civic Si.
The Civic Si is Honda's best-value performance car. It delivers engaging driving dynamics, a rev-happy turbo engine, and a manual transmission in a practical daily driver. Our modifications are designed to enhance what makes the Si special — more power, better sound, sharper handling, and improved aesthetics — without breaking the bank. We use brands that Si owners trust: PRL Motorsports, 27WON, Invidia, Greddy, Skunk2, Enkei, Rays, and more.
Exhaust Systems — The factory Si exhaust muffles the L15B7's turbo character. A quality cat-back exhaust transforms the sound and adds a few horsepower. The Invidia Q300 is the most popular Si exhaust — refined tone with quality stainless construction. The Greddy Supreme SP delivers a deeper, more aggressive note. Skunk2 MegaPower offers classic Honda exhaust character. PRL Motorsports front pipes paired with any cat-back add measurable power gains beyond sound alone. For 10th gen owners on a budget, the Remark cat-back delivers solid sound and quality under $500. The 11th gen exhaust market is expanding rapidly as more brands release FE-specific systems.
Wheels & Tires — The bolt pattern changed between generations — the 10th gen Si uses 5x114.3, while the 11th gen switched to 5x120. We carry lightweight aftermarket wheels for both platforms from Enkei (RPF1, TS-10), Rays (Gram Lights 57DR), fifteen52 (Turbomac), Option Lab (R716), Konig (Hypergram, Ampliform), and WedsSport. 17x8 and 18x8 are the most popular Si sizes. Lighter wheels improve throttle response, braking distance, and turn-in feel. Every set includes mounting, balancing, TPMS programming, hub-centric rings, and test fitting.
Intake & Intercooler — The L15B7 turbo-four comes alive with a cold air intake and upgraded intercooler. PRL Motorsports cold air intake drops intake temps and adds power across the RPM range. The 27WON intercooler eliminates heat soak during spirited driving — consistent power pull after pull. AEM and K&N intakes offer affordable entry points for Si owners starting their build. Pair any intake and intercooler combination with a KTuner or Hondata tune to maximize the gains — 20 to 35+ WHP on 93 octane with full bolt-ons.
Suspension & Handling — The Si's independent suspension is tuned for sport driving from the factory, but lowering springs and coilovers elevate the handling further. Eibach Pro-Kit springs deliver a clean 1-inch drop with improved body control and no harshness. Tein Flex Z coilovers offer adjustable ride height and 16-way damping adjustment at a competitive price. BC Racing coilovers provide track-capable performance with street comfort. A Progress rear sway bar reduces understeer for sharper turn-in. We include a four-corner alignment with every suspension install.
Audio & Interior — The factory Si audio system is adequate but uninspiring. We install component speakers, compact subwoofers, and amplifiers from JL Audio, Focal, Kicker, Alpine, and Kenwood. DSP tuning optimizes the sound for the Civic's interior. Full integration with Apple CarPlay, Android Auto, and the factory head unit — no loss of controls. Interior upgrades including shift knobs, weighted shift assemblies, and trim accessories.
Appearance — Front lip kits, side skirts, rear spoilers, and diffusers sharpen the Si's sport styling for under $500. Window tint adds privacy, UV protection, and a clean finished look. Paint protection film (PPF) on the front end protects against rock chips. Ceramic coating for long-lasting gloss. Vinyl wrap for accent details or full color changes. The Si is one of the most visually rewarding cars to modify because small changes make a big impact on its clean lines.
- 11th gen (FE, 2022+) and 10th gen (FC, 2017-2021) Civic Si
- L15B7 1.5L turbocharged four-cylinder — 200 HP factory
- 5x120 (11th gen) and 5x114.3 (10th gen) bolt patterns
- Exhaust — Invidia, Greddy, Skunk2, PRL, AWE, Remark
- Wheels — Enkei, Rays, fifteen52, Option Lab, Konig, WedsSport
- Intake & Intercooler — PRL Motorsports, 27WON, AEM, K&N
- Suspension — Eibach, Tein, BC Racing, Progress sway bars
- Tuning — KTuner, Hondata FlashPro
- Audio — JL Audio, Focal, Kicker, Alpine, Kenwood
- Appearance — lip kits, tint, PPF, ceramic coating, wrap
- Financing available on all Si builds
We serve Civic Si owners from across the Kansas City metro — Overland Park, Olathe, Lenexa, Leawood, Prairie Village, Lee's Summit, Independence, Blue Springs, Liberty, Lawrence, and Topeka. The Si is one of the best platforms for budget-friendly performance modification, and we help you get the most out of every dollar. Call 913-291-2027 for a free quote or visit us at 12310 W 62nd Ter, Shawnee, KS 66216.
Invidia, Greddy, Skunk2 — turbo tone unlocked
Enkei, Rays, fifteen52 — 5x120 and 5x114.3
PRL, 27WON — bolt-on power for the L15B7
Full bolt-on Si builds from $3,000 to $5,000
Why Choose American Fusion Wheels for Civic Si Customization Kansas City
Professional service, quality parts, and expert installation — all under one roof in Shawnee, KS.
Si Exhaust Systems
Performance exhaust upgrades for the L15B7 1.5L turbo-four in both 11th gen (FE, 2022+) and 10th gen (FC, 2017-2021) Civic Si. Cat-back systems and front pipes from Invidia, Greddy, Skunk2, PRL Motorsports, AWE, and Remark. The L15B7 sounds surprisingly aggressive with the right exhaust — deep turbo tone without the rasp. Budget-friendly options starting under $500.
Wheels & Tires
The 11th gen Civic Si uses a 5x120 bolt pattern while the 10th gen uses 5x114.3 — knowing the difference matters for fitment. We carry lightweight wheels from Enkei, Rays, fifteen52, Option Lab, Konig, and WedsSport in 17 and 18-inch sizes for both generations. Lighter wheels improve throttle response, braking, and handling. Every set includes mounting, balancing, TPMS, and test fitting for your specific Si.
Intake & Intercooler
The L15B7 turbo-four responds well to intake and intercooler upgrades. PRL Motorsports cold air intake and intercooler are proven performers on the Si platform. 27WON intercooler and charge pipe upgrades eliminate heat soak for consistent power. AEM and K&N intakes offer affordable entry points. Pair with a KTuner or Hondata tune for 20 to 30+ additional wheel horsepower on the stock turbo.
Suspension & Handling
The Civic Si already handles well for a sport compact, but lowering springs and coilovers sharpen the experience. Eibach Pro-Kit springs for a clean drop with improved body control. Tein Flex Z and BC Racing coilovers for adjustable ride height and damping. Progress rear sway bar for reduced understeer. Alignment included with every suspension install to maximize the handling benefits.
Audio & Interior
The factory Si audio leaves room for improvement. We install component speakers, amplifiers, and compact subwoofers from JL Audio, Focal, Kicker, Alpine, and Kenwood. DSP tuning optimizes the sound for the Civic's interior. Full integration with the factory head unit and Apple CarPlay / Android Auto — no loss of controls or functionality. Interior accessories and shift knobs also available.
Appearance
Lip kits, side skirts, rear spoilers, and diffusers to sharpen the Si's sport styling. Window tint for privacy, UV protection, and a clean look. Vinyl wrap for accent details or full color changes. Paint protection film (PPF) on the front end to shield against rock chips. Ceramic coating for long-lasting gloss and easy maintenance. Budget-friendly appearance upgrades that make a big visual impact.
Our Process
From consultation to completion, we make it easy.
Plan Your Si Build
Tell us your Si generation (11th or 10th gen), current mods, and goals. We will recommend the best parts for your budget and put together a build plan with pricing.
Expert Installation
Our technicians install everything in-house — exhaust, wheels, intake, intercooler, suspension, tuning, and appearance — using Honda-specific procedures and torque specs.
Drive the Difference
Leave with a Civic Si that sounds, handles, and performs better than you expected. We stand behind every install.
Frequently Asked Questions
Common questions about civic si customization kansas city at American Fusion Wheels.
What are the best modifications for a Civic Si?
The best starting mods for a Civic Si are an exhaust, intake, and a tune. A cat-back exhaust from Invidia or Greddy gives you the sound the Si should have had from the factory. A PRL or 27WON intake and intercooler upgrade adds consistent power and eliminates heat soak. A KTuner or Hondata tune ties the bolt-ons together for 20 to 30+ additional wheel horsepower. After the performance basics, lightweight wheels and lowering springs are the next best upgrades — they transform both the look and the driving experience. Total cost for all five upgrades runs $3,000 to $5,000 installed, making the Si one of the best bang-for-buck performance platforms on the market.
What is the difference between a Civic Si and Type R?
The Civic Si uses a 1.5L turbocharged L15B7 engine making 200 HP, while the Type R uses a 2.0L turbocharged K20C1 making 306 to 315 HP. The Type R has a limited-slip differential, Brembo brakes, more aggressive suspension, wider body, and a large rear wing. The Si is a fantastic daily driver that responds extremely well to bolt-on modifications — you can build a 250+ WHP Si for significantly less than the price difference between an Si and Type R. Many Si owners choose to modify rather than buy a Type R because the value proposition is excellent. The Si is the budget-friendly entry point to Honda turbo performance.
What are the best exhaust options for the L15B7 engine?
For the L15B7, the Invidia Q300 is the most popular cat-back — refined tone, quality construction, and reasonable pricing. The Greddy Supreme SP offers a deeper, more aggressive note. Skunk2 MegaPower delivers classic Honda exhaust sound. PRL Motorsports front pipe paired with any cat-back adds power gains beyond just sound. AWE Touring provides a refined daily-driver sound with performance gains. For 10th gen owners on a budget, the Remark cat-back is a solid entry point under $500. The 11th gen has fewer exhaust options currently, but the market is growing rapidly as more brands release FE-specific systems.
Did the bolt pattern change between the 10th and 11th gen Civic Si?
Yes. The 10th gen Civic Si (FC, 2017-2021) uses a 5x114.3 bolt pattern, while the 11th gen Si (FE, 2022+) switched to 5x120. This means wheels from the 10th gen will not fit the 11th gen and vice versa. The center bore also changed. This is an important detail when shopping for aftermarket wheels. We carry wheels for both bolt patterns from Enkei, Rays, fifteen52, Option Lab, Konig, and WedsSport. Every set we sell is confirmed to fit your specific generation of Si with proper offset and hub-centric rings.
What kind of tuning gains can I expect with KTuner or Hondata on a Civic Si?
On a stock Civic Si, a KTuner or Hondata tune alone adds roughly 10 to 15 WHP by optimizing boost, fuel, and ignition timing. With bolt-ons (intake, intercooler, exhaust, and front pipe), a tune unlocks 20 to 35+ additional WHP on 93 octane — more on E85 or E30 blends. The L15B7 stock turbo typically maxes out around 250 to 270 WHP with full bolt-ons and a quality tune. Both KTuner and Hondata offer off-the-shelf maps for common bolt-on combinations, plus custom tuning for more aggressive builds. We install and configure both platforms.
Will modifications void my Honda warranty on the Civic Si?
Under the Magnuson-Moss Warranty Act, Honda cannot void your entire warranty simply because you installed aftermarket parts. They can only deny a specific claim if they prove the modification directly caused the failure. Exhaust systems, wheels, and suspension upgrades rarely cause warranty issues when properly installed. Intake and tuning modifications carry slightly more risk since they affect engine management — if you are concerned about warranty, an exhaust and wheel upgrade with lowering springs is a safe starting point. We install everything to specification and use quality components to minimize risk.
What is the typical cost range for Civic Si modifications?
Civic Si modifications are some of the most budget-friendly in the sport compact market. A quality cat-back exhaust runs $400 to $1,200 installed. Aftermarket wheels and tires range from $1,200 to $3,000 for a set. An intake and intercooler upgrade runs $800 to $1,800 installed. Lowering springs cost $300 to $600 installed, coilovers $800 to $2,200. A KTuner or Hondata unit runs $400 to $700. A full bolt-on build with exhaust, intake, intercooler, wheels, springs, and tune typically lands between $3,000 and $5,000 total. That is exceptional performance value. Call 913-291-2027 for a free quote on your specific Si build.
How long do Civic Si modifications take to install?
Most individual mods are completed same day. A cat-back exhaust takes 1.5 to 3 hours. A wheel and tire swap with TPMS takes 1 to 2 hours. Intake and intercooler installation runs 2 to 3 hours. Lowering springs take 2 to 4 hours including alignment. Coilover installation takes 4 to 6 hours including alignment. A full bolt-on build with exhaust, intake, intercooler, wheels, and tune can typically be completed in one day with advance scheduling. Call 913-291-2027 to schedule your appointment so we can have parts ready when you arrive.
Kansas City's Civic Si Customization Shop
Getting Here
We are at 12310 W 62nd Ter in Shawnee — right off I-435 and K-7 Highway. Serving Honda and Civic Si owners from across the Kansas City metro.
Open in Google Maps →"Took my 11th gen Si to American Fusion Wheels for the full bolt-on treatment — PRL intake, 27WON intercooler, Invidia Q300 exhaust, Enkei RPF1 wheels in 17x8 with Continental ExtremeContact Sport tires, Eibach Pro-Kit springs, and a KTuner tune. The car went from a fun daily driver to a genuinely quick sport compact. The exhaust sounds amazing without being annoying on the commute. The Enkei RPF1s saved weight and the car feels so much sharper on corner entry. And the KTuner tune with full bolt-ons added 30 wheel horsepower on 93 octane — the car pulls noticeably harder through the mid-range now. Total build cost was under $4,500 installed, which is insane value for the performance gain. These guys understand the Honda platform and helped me prioritize mods in the right order. Highly recommend."— Jason K. 2023 Honda Civic Si (FE)
The Honda Civic Si is one of the most popular sport compacts in the Kansas City area — affordable, reliable, and rewarding to modify. American Fusion Wheels is the KC metro's trusted Civic Si customization shop, helping Si owners get the most performance and style out of their budget. From a simple exhaust and wheel upgrade to a full bolt-on build with a tune, we handle it all in our Shawnee shop. Located right off I-435 and K-7, we are a quick drive from Overland Park, Olathe, Lenexa, Leawood, Lee's Summit, and anywhere in the metro. Whether you daily your Si or build it for weekend spirited driving, we have the parts, experience, and expertise to make it happen.
Browse Civic Si Parts & Accessories
Find exhaust, wheels, intake, and performance parts for your Civic Si.
Civic Si Customization Kansas City Near Kansas City
American Fusion Wheels proudly serves the entire Kansas City metro area from our Shawnee, KS location — including Overland Park, Kansas City & surrounding communities.
Ready to Upgrade Your Ride?
Call us or visit our Shawnee, KS shop. Walk-ins welcome, appointments preferred for large jobs.
🏔️
Jeep & Off-Road Specialists
Wrangler & Gladiator builds, lift kits, armor, winches, lockers & regearing
Explore Jeep Builds →Ready to Get Started?
Call us today for a free consultation and quote. Walk-ins welcome!
Proudly Serving the Kansas City Metro
Shawnee • Overland Park • Lenexa • Olathe • Leawood • Prairie Village • Mission • Merriam • Roeland Park • De Soto • Lee's Summit • Blue Springs • Independence • Gardner • Spring Hill • Grandview • Raytown • Liberty • Gladstone • Kansas City KS • Kansas City MO
12310 W 62nd Terrace, Shawnee, KS 66216
Mon-Fri: 9:00 AM - 6:00 PM | Sat: 10:00 AM - 3:00 PM
Phone: 913-291-2027