Subaru STI Bypass Valve - GrimmSpeed - V2 - Black - '04-'21. A fully recirculating, direct-fit upgrade built for consistent boost control and dependable performance on your turbocharged STI.

The GrimmSpeed V2 BPV replaces aging factory hardware with a robust, CNC-machined aluminum body and a precision piston designed to resist leakdown. Refined V2 flow helps curb compressor surge during throttle lift, supporting steady boost and clean transitions between shifts. It installs at the factory location and retains the stock recirculation routing for quiet, OEM-like drivability while adding the durability enthusiasts want for spirited street use and track days.

Features

• Fitment: 2004-2021 Subaru STI
• Fully recirculating design; retains factory-style bypass strategy
• CNC-machined aluminum body with durable black finish
• Precision piston and quality sealing for leak-resistant operation
• Bolts to factory locations; uses stock recirculation routing

Have questions about fitment or setup? Call us and our team will help. We offer installation and customization at our Austin, Texas and Los Angeles, California area locations: 512-982-9393 (TX), 562-981-6800 (CA).

Buying multiple items? Contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov