- Produces power gains of up to 20HP vs. stock manifold.

- Combine with our StreetPower cat-back exhaust system (Part #1626 for Civic Si Coupe and Part #1622 for Civic Si Sedan) for even greater power gains.

- Features a huge 2 1/2" Outlet

- This header includes a High Flow Metal Core Catalytic Converter. This header is also available with a Cat-Delete option (part #2508).

Comes with a Two Year Warranty