Killer B Equal Length 4-1 Holy Header EJ Series 2-Bolt Camshafts Lighter components

Lighter components

*Requires “A” loom

dyno testing

Link G4X and G4+ Fury (Loom A/Pin Kit A also required)

2016 Subaru WRX STI Series

Killer B Equal Length 4-1 Holy Header EJ Series 2-Bolt Camshafts Lighter componentsThe Killer B Motorsport Holy Header was developed using state of the art CAD software & simulations to determine the optimal design for increasing power as much as possible throughout the rev 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