The PROX Engine Rebuild Kit provides a complete rotating and reciprocating assembly, encompassing the crankshaft, main bearings, seals, pistons, and a full engine gasket kit. Crankshafts arrive fully assembled with Maxima® assembly lube and undergo in-house inspection for dimensional accuracy and trueness. The kit utilizes Japanese-sourced Koyo main bearings, OEM-quality seals, and versatile gasket kits designed to cover multiple applications with fewer part numbers. Available in A/B/C graded bore sizes, these components were developed through extensive research and testing on ProX’s in-house engine dyno.
Connecting rods feature a proprietary in-house design, undergoing forging, heat treatment, and shot peening to enhance tensile strength and reduce stress risers. Each rod includes graded big-end bearings for precise clearance and a bronze small-end bushing to improve longevity. Pistons are cast from OEM-grade alloy and incorporate a MOS2 skirt coating along with hard-anodized crowns and ring grooves, which reduce friction and improve heat resistance for increased wear resistance.