Killer B Motorsport 4-1 Holy Header Exhaust Manifold w/ V Band Upipe 2002-2014 WRX / 2004-2021 STI / 2004-2013 Forester XT / 2004-2009 Outback XT / 2004-2009 Legacy GT YMM_2005_Forester complementing the heavy-duty pressure plate

complementing the heavy-duty pressure plate

For optimal results and to ensure proper fitment

It’s an essential upgrade for enthusiasts who push their engines hard and demand reliable lubrication under extreme conditions

This premium rotor delivers improved initial pad bite and superior cooling performance thanks to its precision-drilled surface

Killer B Motorsport 4-1 Holy Header Exhaust Manifold w/ V Band Upipe 2002-2014 WRX / 2004-2021 STI / 2004-2013 Forester XT / 2004-2009 Outback XT / 2004-2009 Legacy GT YMM_2005_Forester complementing the heavy-duty pressure plateThe Killer B Motorsport Holy 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