Quick view OMIX Omix Piston 2.5L & 4.0L Standard 96-06 Jeep Models - 17427.12 Compare $79.99 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... Add to Cart Add to Cart