APEXi N1 Evo Extreme Catback Exhaust (FK8 Civic Type R)

If you're building your FK8 Civic Type R for the street or the track, the APEXi N1 Evolution Extreme Catback Exhaust is one of the most well-rounded bolt-on upgrades you can make. It's designed specifically for the 2017-2021 Honda Civic Type R (FK8), and every detail of this system reflects APEXi's decades of exhaust engineering — not just a rebadged generic pipe.

The straight-through layout removes the restrictive bends and baffling of the OEM system, so your exhaust gases exit faster and more freely. You'll feel that difference in throttle response almost immediately, especially in the mid-range where the FK8's 2.0L turbo really comes alive. The internal hybrid silencer balances that free-flowing design with a tone that's aggressive without being obnoxious — loud enough to hear on a canyon run, civil enough for a daily commute.

APEXi's patented Megaphone piping structure is what separates this system from cheaper alternatives. The expanding megaphone geometry creates a deliberate swirling effect in the exhaust stream, which improves scavenging and promotes consistent flow from low RPM all the way to redline. This isn't a marketing claim — it's the same principle APEXi has refined through motorsport applications for over 30 years.

Construction is SUS304 stainless steel throughout, with precision TIG welds at every joint. SUS304 is an austenitic steel alloy with strong resistance to heat cycling and corrosion — exactly what you need on a turbo car that sees both track days and rainy commutes. The dual 122mm titanium-finished tips are dual-wall construction, which reduces radiated heat and gives you that heat-gradient color over time. At 122mm each, they fill the FK8's rear diffuser cutout properly — no gap, no rattle, no embarrassing fitment issues.

Compared to the factory exhaust, you're also dropping meaningful weight from the rear of the car. Less unsprung and rotational mass at the tail of the vehicle has a real (if modest) effect on how the FK8 rotates through corners — something you'll appreciate on a track day even if it's hard to quantify on the street.

Installation is bolt-on. No cutting, no welding, no fabrication required. Most FK8 owners complete the swap in 1-2 hours with basic hand tools and a standard jack stand setup. No tune is required, and this system does not trigger CEL codes on the FK8 platform. It is compatible with the factory mounting points and OEM-style rubber hangers, so everything lines up the way it should.

Whether your Type R is a dedicated track weapon or a fast daily driver, the N1 Evo Extreme gives you a system that's been engineered for this specific car — not adapted from a universal kit.