Remark 2017+ Honda Civic Si Coupe Cat-Back Exhaust (Non-Resonated)

The 3-inch diameter piping on this Remark cat-back exhaust system is a key design choice for the 2017-2021 Honda Civic Si Coupe. This larger diameter allows for better exhaust gas flow compared to the stock system, which can help the engine breathe more freely. This particular version is non-resonated, meaning it skips the resonator that typically quiets down exhaust noise. If you're looking for a more raw, aggressive sound that lets the engine's character come through, this is the setup you'll want.

Remark builds this system from T304 stainless steel, a well-known material for its strength and resistance to corrosion, especially important for exhaust components that deal with heat and moisture. The system is designed as a direct bolt-on replacement for your factory cat-back exhaust, simplifying the installation process. You'll find that the mandrel-bent tubing maintains a consistent inner diameter throughout the bends, which further aids in smooth exhaust flow and prevents any restrictions that crush bends can cause. This attention to detail in construction helps ensure you get the most out of the improved flow.

When installing this cat-back system, you'll be replacing the factory piping from the catalytic converter back to the rear of the vehicle. Because this is a non-resonated system, expect a notably louder and more aggressive exhaust note than a resonated version or the stock setup. This system is designed to fit the Coupe body style of the 2017-2021 Honda Civic Si. Ensure you have the necessary tools and potentially a helper for installation, as exhaust components can be heavy and awkward to maneuver.