Featuring Turbonetics' Raptor blow-off / bypass valve, this kit includes all necessary mounting hardware, silicone hoses, and adapter flange. This unique proprietary blow-off / bypass valve design allows boost pressure to be vented into the atmosphere without the need of recirculation. Kit also includes a discharge horn to provide the tight ''VRSHOOOOSH'' between shifts. The new large valve compared to the stock bypass valve allows the vehicle to be more responsive between shifts, preventing compressor surge. Approximate install time 1-2 hours.