Feuling Part #9010Camplate Psi TesterThis pressure test tool is a must for any H-D� Twin Cam engine builderBench test each camplate before installation, cycle the pressure relief valve, testing operation and assuring the valve moves freely, seats and seals each time, any leakage at the relief valve will reduce oil pressureThis tool allows the engine builder to know what PSI the relief valve opens; the spring tension can be adjusted to achieve the desired pop off PSITool includes: air regulator, 0 - 100 psi pressure gauge, gasket & needed hardware, fits all Twin Cam engine camplates. Feuling� recommends the camplate valve be seated 0-30 psi with full pop off at 55-60 psiMade in the U.S.A.Package Quantity = 1