Version 2 Bypass Valve

The GrimmSpeed Version 2 Bypass Valve is engineered to eliminate boost leaks common in OEM and other aftermarket bypass valves. This Version 2 features a redesigned internal piston made from lighter, hard aluminum for better response, replacing the brass piston from the V1 design. The main body and base are CNC-machined from billet 6061 aluminum alloy, offering superior strength and a premium look with an anodized black or red finish. Designed for enhanced performance and reliability, the bypass valve incorporates an oversized 38mm anodized aluminum piston and a Buna-N O-ring with a single dovetail design for excellent retention and sealing. This robust construction is built to withstand double the pressure of stock units, preventing turbo damage and ensuring leak-free operation even on high boost applications. A precisely-tuned steel spring is integrated to ensure consistent operation, and notably, **no engine tuning is required** to run this unit. The valve also features a swivel air fitting to simplify installation and accommodate custom setups. This bypass valve is specifically designed for the 2015-2021 Subaru WRX and the 2014-2018 Subaru Forester XT.