Turbosmart TS-0205-1072 Black 38 mm Outlet Dual Port Universal Blow Off Valve Most versatile blow off valve Fully adjustable Reduces turbo spool-up between gears Suits medium sized turbocharger systems on 4 to 6 cylinder engines developing 200 to 600 horsepower Includes 1 dual port blow off valve, 1 blanking plug, 1 extra trumpet, 1 v-band clamp, 32 millimeter aluminum weld-on inlet adapter and sticker and instructions CD