TiAL QR blow-off valve fitted with a 12 PSI spring, a 1.5in inlet and a purple finish. Intended to vent excess boost pressure on turbocharged systems while sealing under pressure, it helps preserve compressor stability and smooth throttle response. The 1.5in inlet fits larger piping setups and the 12 PSI spring determines the valve’s cracking pressure for consistent, repeatable operation.

TiAL Sport QR BOV 12PSI Spring - Purple (1.5in)