Introducing the world's first Hybrid TMS Blow Off Valve – a ground breaking new design that delivers all the benefits of a traditional blow-off valve without the risk of stalling or backfiring. The Hybrid's two venting ports are staged on the body so that the recirc port opens before the atmo port, helping prevent these problems on cars with a MAF sensor. These Hybrid TMS Blow Off Valves optimizes the performance of advanced TMS benefits and feature a spring pre-load adjustment for maximum response.