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Recommended for API GL-5
Designed as a direct replacement for the factory cat-back exhaust
5" secondary
Years Make Model Liter Cylinder Notes 02-05 Subaru WRX 2L 4 MT/AT
and gauges
Killer B Motorsport 321 Stainless Steel Holy Header With 2-Bolt Flange volkswagen Recommended for API GL-5The Killer B Motorsport Holy Header was developed using state of the art CAD software & simulations to determine optimal design to increase 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 time
