Wabco Relay Valve brake parts P/N: 9732980050, for help on parts, availability or questions we will gladly help!Tech SpecsCalculated Volume (dm)1.069ExhaustSnap-on contour JED – 463Max. operating pressure159.54 psiMounting2x 24.5×10 mmOpening pressure3.92 psiPort thread 11/2″ – 14 Dry Seal NPTFPort thread 21/2″ – 14 Dry Seal NPTFPort thread 41/4″ – 18 Dry Seal NPTFPredominance3.92 psiRegulating ratio1:1Technical specificationOE specificationTemperature range-40C to +94CVersionPressure reductionSize (mm x mm x mm)105 x 105 x 97