Over time all internal engine wear surfaces become worn. This is true for crankshaft journals, connecting rods, camshaft lobes, piston rings, bearings, etc. When rebuilding a worn out engine youll need to replace them all in order to regain the engines original performance. And, lets face it, Jeeps need all the power we can get. Omix offers new high quality replacement engine parts to get your Jeep back on the road. This replacement piston ring set fits 71 - 75 CJ5 CJ6, 72 - 73 Commando, 72 J - Series trucks and 74 DJ5 models equipped with 304 ci AMC eight cylinder engines with standard bore. One set does one engine. Replaces OE 3207514