Old Part Numbers: KU181Air compressor unloader valve, includes washer. If your unit is using too much oil or is not performing like it once did, then you may need to replace the valves. 

Old Part Numbers: K133This air compressor pump ring kit includes rings for two pistons. Order two sets for v-twin air compressor pumps. Stagger rings and hone cylinders.  Replace if the pump is losing compression or using too much oil.Technical...

Old Part Numbers: WU101Complete rebuild kit for your WU Pump v-twin, two-stage air compressor pump. Includes piston rings, intake and exhaust valves, unloader valves, gaskets, air filter elements (L54E hollow-style), and seals. If you have a sudden loss...

Old Part Numbers: EQ132High Pressure (HP) Piston with wrist pin and rings.

Old Part Numbers: W175UNLOADER,CENTRIFICAL,W/B CAP,ASSY,W175 1 EA ASSY. W / BEARING CAP, TUBING AND GASKET