- The Killer B Motorsport External Wastegate (EWG) Header was developed using state of the art CAD software & simulations to determine optimal design to increase power in the mid to high RPM range. Short as possible primaries with a single secondary significantly decrease header volume allowing exhaust gas pressure to build quickly. Symmetrical 4-1 design maintains high and consistent exhaust velocity as RPMs rise. You can expect faster spool up time compared to long primary/double secondary designs. A difference you will immediately notice in throttle response and the ability to hold more power higher into the revs. Features include:
Fits all 2002-2014 WRX and STI, but EJ20 cars will have to use an EJ25 oil pan.
Shipping Weight: 40.0 lb
Supplier: Killer B