Subaru STI Bypass Valve - GrimmSpeed V2 - Red (2004–2021). A recirculating upgrade that replaces the factory valve while maintaining smooth drivability and crisp turbo response.

Purpose-built for MAF-based Subarus, this V2 BPV delivers consistent boost control and reliable recirculation, helping reduce compressor surge and erratic fueling that can occur with vent-to-atmosphere setups. Its direct-fit design for 2004–2021 STI models keeps installation straightforward, and the robust construction with a red finish stands up to heat and pressure. Internal refinements in the V2 improve responsiveness and durability for street, track, and daily use.

Features

• Direct-fit for 2004–2021 Subaru STI
• Fully recirculating design preserves MAF tuning and drivability
• V2 updates for refined response and reliability
• Durable metal construction with red finish
• Built to hold boost better than a worn factory valve

Have questions or need guidance on your build? Call our team—we offer professional installation and customization at our Austin, Texas and Los Angeles, California area locations. Reach us at 512-982-9393 (TX) or 562-981-6800 (CA).

Thinking about 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