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Improves supercharger reliability and performance by relieving unwanted pressure during off-throttle operation. Reduces supercharger clutch & gear wear and eliminates heat soak in discharge tube. The body and all internal components are CNC-machined from 6061 aluminum alloy. Features a large 50mm valve. The V-Band design aluminum mounting clamp provides secure and clean mounting. Clamp uses Stainless Steel hardware for a long lasting, corrosion-free appearance. Valve seal utilizes a Viton O-ring that is clamped in place for maximum durability. Valve stem and guide are Teflon-lubricated and hard anodize-coated for wear resistance. Blow-off Valve also comes with our own machined aluminum banjo-type air fitting and bolt with oversized 10mm hose barb for quick actuator response. INCLUDES 11 PSI (YELLOW) SPRING.Included with TiAL Blow-Off Valve: