Piston, .030 inch Over, 1983-1995 (2.5L AMC), 1987-1993 4.0L 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 you'll need to replace them all in order to regain the engine's original performance. And, let's face it, Jeep's need all the power we can get. Omix-ADA offers new high quality replacement engine parts to get your Jeep back on the road. This replacement piston fits 83 CJ5, 83-86 CJ7 / CJ8, 84-95 Cherokee XJ, 84-88 J-Series trucks, 86-92 Comanche MJ, 87-95 Wrangler YJ and 93-98 Grand Cherokee models equipped with 2.5 or 4.0 liter engines with 0.030-inch over-bore. Includes wrist pin. Sold individually- use four or six depending on application. Replaces OE 83500251.030