Nuke blow off valve 50mm black - Hose connection 50 mm piston valve with the highest flow capacity available. When it is necessary to be able to rely on the installation and function. Designed with a oversized 50 mm valve; we believe this is the largest valve available with the highest flow capacity. The body and all internal components are CNC-machined from 6082 aluminum alloy, anodized for a long lasting, corrosion-free appearance. The Blow off Valve comes with one quick connect pneufit fitting, with oversized 1/4 connection for quick and actuator response. If needed, barb fittings are available. Dimensions: Hight: 98mm Diameter: 88mm Spring Pressure Chart:  0,50 - 0,75 bar / 7,25 - 10,9 psi : Additional BLACK SPRING 0,35 - 0,50 bar / 5,07 - 7,25 psi : Stock / included BLUE SPRING 0,00 - 0,35 bar / 0,00 - 5,07 psi : Additional WHITE SPRING ** Measure engine vacuum at idle and with engine at operating temperature.