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Ships within 48 hours · Estimated delivery Nov 2 - Nov 7
For optimal results and to ensure proper fitment
It mounts easily to USDM-drilled holes or molded JDM holes on 2015+ WRX/STI models
Finish: Black anodized or coated for corrosion resistance
this set of four plugs is a smart upgrade for your turbocharged Subaru
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 For optimal results and toThe 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
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