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2022+ Civic Si/Acura Integra Front-Pipe Back Exhaust

2022+ Civic Si/Acura Integra Front-Pipe Back Exhaust

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A new generation of Honda Civic Si and Acura Integra means a bold new look and sound from 27WON for the 2022+ FE1/DE4 chassis.

Setting the bar high as only we know how, this new front pipe back exhaust system for the 11th generation Honda Civic Si and 5th Generation Acura Integra respects the OEM look with its dual-tip setup and ups the volume with a growl that turns heads. It's constructed from 100% T304 Stainless steel and TIG welded from end to end. The 27WON exhaust is the most premium system you can get for your Honda Civic Si and Acura Integra.

Available for purchase as either a front-pipe back system, with a 2.5" front-pipe, or as a complete turbo back exhaust system, you are sure to find the volume and level of performance you want.

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A two phase resonator is perfectly placed on each side of the car to give this system both a clean look and deep sound. This two phase system uses an expansion chamber resonator and an absorption resonator to remove both high and low frequencies and allow the exhaust gases to pass straight through which reduces back-pressure to increase performance potential.

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Dual 100mm polished tips with our signature logo plates enhance the premium look of your Civic or Integra. These are made from the same stainless steel as the rest of the system and are designed to perfectly fill the space in the bumper cutout.

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Improving exhaust flow is a huge key to enhancing the performance of your engine. To do this we increased the exhaust piping diameter from 50mm up to 63.5mm to reduce back pressure and make it easier for hot spent exhaust gases to leave your turbocharger. This results in a 58% increase in cross-sectional area to support future power modifications and also delivers a nice deep tone.

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Choose your volume. The 27WON exhaust system for the 11th generation Honda Civic Si and 5th generation Acura Integra can be had in 3 different configurations. Choose from a front-pipe back only system, with a 2.5" high-flow front pipe, or as a full turbo-back exhaust system which comes with our 80mm high-flow catted downpipe.

You can piece this system together at your own pace or bundle them all and save by purchasing the entire system at once.

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All 27WON exhaust systems are made from T304 stainless steel tubing that is CNC mandrel bent and precision TIG welded. All of the pipes are then completed in a brushed finish for an exhaust that will look as new years from now as the day you took it out of the box.

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Slip joints are cheap and often are a pain. 2-bolt flanges are prone to leaks which also make them less than ideal. This is why we offer our system with 3-bolt flanges. This method of attaching the exhaust system is optimal for both sealing and perfect alignment during install. Rounding out this complete package included is a set of perfectly matched custom gaskets so you'll get a system that won't leak and will last the life of your vehicle.

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Not only do you want to make power and sound good, but it's just as important to look good too. We spent the time dialing in the optimal hanger locations and flange orientation to ensure perfect fitment. Our slotted bolt holes and lengthened hanger rods allow you to dial in how the system sits underneath the car to give you that spot-on look you're after.

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Read both of our design blogs below for more details on the creation of the best exhaust system for your 11th generation Honda Civic Si or 5th generation Acura Integra:


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Going bigger in the right places.

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  • Limited Lifetime Warranty
  • Fully personalized after purchase support on all 27WON products
  • Free shipping in the Continental U.S. and discounted International shipping
  • Complete online installation instructions through the Dozuki App: Search “redefine”
  • Install app downloads can be found here Play Store and Itunes

Installing Your Performance Front Pipe Back Exhaust System

Difficulty: 3/5

3/5 Difficulty


Love the exhaust . Good sound and deep. My car will be all 27 won parts . Want to see more 11th gen civic si . What next to come...
Very happy with this exhaust. Communication with 27won prior to and after the sale was excellent. The sound and volume of the FP back system is exactly what I was looking for. Very deep, loud but not obnoxious. Their install instructions were very detailed and helpful. With the car on ramps it took me 3.5 hours to remove the old system and install this one. If I had a helper it would have cut an hour off that time. Great product!
Really impressed with the quality of this exhaust. The exhaust has a nice deep tone. Install was pretty straightforward.
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CEL can be illuminated when purchased with a downpipe
2022+ Civic Si Sedan
2023+ Acura Integra
*Performance catted downpipe for off-road use only