Universal 38mm Turbo V-Band Blow-Off Valve Kit (Black) High-Quality Diaphragm and Short Stroke Significantly Increase Response. Draws In Surrounding Air and Releases Aggressive Unique Discharge Sound Spring System Promoted Response and Allows for High Boost Pressures Hard-Anodized Valve for Increased Air Flow. Powder-Coated Anodized and Polished Finish. CNC Machined Billet Aluminum Body 38mm Flange Diameter; Holds Up to 35-PSI Boost Pressure Easy Installation. Universal Application For All Turbo & Intercooler Upgrades