Brian Crower Valve Springs - Single - 2004-2021 Subaru STI / 2002-2005 WRX PDM_exhaust-mid-pipes 3/8" SAE push-on female quick

3/8" SAE push-on female quick disconnect to a -6AN male flare

then don't stop there

Will work with Injen X-1012

GrimmSpeed V2 bypass valve

00" diameter sensor hole

Brian Crower Valve Springs - Single - 2004-2021 Subaru STI / 2002-2005 WRX PDM_exhaust-mid-pipes 3/8" SAE push-on female quickBrian Crower Valve Springs Single Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, super clean, chrome silicone alloy and feature proprietary processing procedures for consistent pressures. Improve your engine performance with BC valve springs. Made from the highest quality materials and crafted with precision, these springs are perfect for high rpm applications. Specs: Type: Single Free Length: 1. 788"