Turbosmart TS-0203-1217 Kompact Plumb Back Blow Off Valve

The Turbosmart Kompact Plumb Back is a full recirculating blow off valve (BOV) designed as a high-performance, direct-fit upgrade over factory plastic diverter valves. Engineered for turbocharged vehicles running factory BOSCH or DENSO bypass valves, this BOV delivers improved boost response and superior boost handling without the characteristic atmospheric venting sound — making it the ideal choice for street-driven builds where a stealthy setup is preferred.

The Plumb Back configuration recirculates all excess boost pressure back into the intake system, keeping the factory air/fuel metering unaffected. The billet aluminum body and positive-sealing O-ring piston eliminate the cracking, leaking, and boost loss commonly associated with OEM plastic valves. Turbosmart's proprietary Boost-Balance Technology means the valve seals more effectively as boost pressure increases — there is no upper boost threshold at which the valve will unseat or leak.

Key Features:

• Full recirculating (plumb back) design — no atmospheric venting for stealth operation
• Billet aluminum body construction for long-term durability and heat resistance
• Positive-sealing O-ring piston for a leak-free, reliable seal under high boost
• Boost-Balance Technology: sealing force increases proportionally with boost pressure
• Green spring installed from factory, rated at -15 inHg
• Replaces factory BOSCH and DENSO bypass valves on most turbocharged applications
• Adjustable spring tension via top cap rotation for tuning to specific boost levels
• Designed, machined, and hand-assembled by Turbosmart in Sydney, Australia

Important Emissions Notice: This product does not carry a CARB EO number and is not legal for sale or use on pollution-controlled motor vehicles in the State of California. This product is intended for race and off-road competition use only.