ETS Subaru STI V2 MaxFlow Header

This equal-length header replaces the STI exhaust manifold with larger 1⅞-inch runners and a 2½-inch merge outlet. I'd use it when an upgraded turbo and higher airflow make the stock manifold restrictive. Equal-length routing changes the familiar uneven Subaru exhaust pulse sound.

Select the year range and matching two-bolt, three-bolt or V-band up-pipe connection. The V-band option requires the customer to build the up-pipe connection. Slip joints help installation and thermal movement; ETS lists clearance for IAG and Killer B oversized pans.