Tial Q BV50 Stye BLACK 50mm Blow off Valve BOV 6PSI 18PSI Springs 2 Day Delivery For street-driven turbocharged and supercharged vehicles.  CNC Machined to the highest standards from 6061 Aluminum, the BV50 features a large 1.98" (50.5mm) valve, among the largest in the world.  The valve and seal use a viton O-ring clamped in placed to prevent sticking or pulling out.  The valve stem and guide are Teflon-lubricated and hard anodized for superior wear resistance.  The V-band clamp makes install clean and simple.  The banjo fitting is over-sized for faster actuator response.  The actuator has a high temp silicone Nomex-reinforced diaphragm for extended life.  Each BV50 can support up to 35PSI with alternate spring options.  These blow off valves are a must-have for any high performance, boosted vehicle.     Included: Tial BV50 Style Blow off Valve (1) Weld-on Flange (1) V-Band Clamp (1) Banjo Bolt Kit (1) Seal (1) 18psi spring (1) 6psi spring (Installed in BOV)