Description
Brian Crower Intake Valves 37mm (+1mm head diameter) Subaru WRX 2002 2014 STI 2004 2021 BC3604 S vendor_P3 Gauges GrimmSpeed Caps install in seconds GrimmSpeed Caps install in seconds it's as simple as removing the factory pieces and popping The GrimmSpeed versions in their place This kit interfaces with the factory feed and return hard lines in the engine bay (near the LH strut tower) and provide all the underhood fuel plumbing