Turbo Blow Off Valve Aluminum for VW Audi 1.8T 2.7T Diverter

Machined specifically for Volkswagen and Audi forced-induction platforms, this high-performance turbo diverter valve replaces fragile stock plastic units with a durable T6 aviation aluminum design. Instead of releasing pressurized air into the atmosphere, the recirculation design routes backflow directly into the turbocharger inlet pipe. This critical difference prevents compressor surge, stops turbo stalling during late-shift downshifts, and maintains optimal manifold vacuum for immediate throttle response. Built with a hard-anodized exterior and precision-tested internals, the unit handles higher boost pressures without fatigue while offering straightforward bolt-on installation.

Benefits & Tips

• Select your operating profile using the color-coded springs: green (5–15 PSI) for calm daily driving, blue (23–30 PSI) for sporty street use, or red (above 30 PSI) when chasing maximum track boost.
• The factory-installed yellow spring covers 15–23 PSI and serves as an ideal baseline for most 1.8T and 2.7T builds.
• Insert the included 2 mm spacers behind the spring plate if you want to increase tension and achieve faster valve closure after gear changes.

Product Specifications

• Construction Material: T6 Aviation Aluminum with hard-anodized coating
• Type: Internal Recirculation Diverter Valve (Forced Induction Boost Control)
• Compatible Engine Families: VAG 1.8T, 2.2T, 2.7T, 4.2T
• Vehicle Fitments: 1998–2005 Audi A4 / A4 Quattro, Allroad Quattro, S4, A6 Quattro; 1999–2006 TT / TT Quattro; 1999–2005 Volkswagen Beetle; 2000–2005 Golf; 2000–2005 Jetta
• Testing Standard: Bench-verified calibration out of the box

Package includes:

• One T6 aluminum recirculation diverter valve assembly
• Multi-range pressure spring set (green, yellow, blue, red)
• Precision machining adjustment spacers

Important Reminders

Dual-turbo 2.7L configurations require two complete valve sets to maintain proper boost control across both banks. Always verify your original equipment OEM number before installation, as manufacturer vehicle mapping serves only as a reference guide and may differ by production month or market variant.

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