27WON Exhaust | 22+ Civic Si, 23+ Integra A-Spec

Unity Performance is the exclusive Canadian Dealer for all 27WON Performance Products in Canada! US folks, please continue to purchase through 27WON directly.

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Fits:

• 2022+ Honda Civic Si (Sedan FE1)
• 2023+ Acura Integra Base/A-Spec (Hatch DE4)

Will also fit the 1.5T Sedan Civic — you'll need to remove the diffuser covers on each side (or replace with Si exhaust shroud covers from your local Honda dealer) to accommodate the tips.

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A new generation of Civic Si means a bold new look and sound, and 27WON built this front-pipe-back system specifically for the 11th-gen FE1 chassis. It respects the OEM dual-tip look while turning up the growl, constructed from 100% T304 stainless steel and TIG welded end to end — the most premium system available for your Civic Si.

A two-phase resonator setup on each side uses both an expansion chamber and an absorption resonator to cancel out high and low frequencies while letting exhaust gases pass through with minimal back-pressure. Piping diameter jumps from the factory 50mm to 63.5mm — a 58% increase in cross-sectional area — for a deeper tone now and headroom for future power mods. Every system uses 3-bolt flanges with custom-matched gaskets instead of leak-prone slip joints or 2-bolt connections, plus slotted bolt holes and lengthened hanger rods so you can dial in exactly how it sits underneath the car.

Features

• 100% T304 stainless steel, CNC mandrel bent and precision TIG welded, brushed finish
• Two-phase resonator design cancels high and low frequencies for a clean, deep tone
• 63.5mm piping (up from 50mm stock) — 58% more cross-sectional flow area
• Dual 100mm polished tips with 27WON logo plates
• 3-bolt flanges with custom gaskets for a leak-free, long-lasting seal
• Slotted bolt holes and lengthened hanger rods for dialed-in fitment
• Available as front-pipe-back only, or as a full turbo-back system with 80mm high-flow catted downpipe