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. All components are developed through research on ProX’s in-house engine dyno, with crankshafts arriving fully assembled using Maxima® assembly lube after in-house inspection for dimensions and trueness. The kit includes Japanese-sourced Koyo main bearings, OEM-quality seals, and versatile gasket kits designed to cover more applications with fewer part numbers, with availability in A/B/C graded bore sizes.
Engine internals feature connecting rods with a proprietary in-house design that are forged, heat-treated, and shot-peened to enhance tensile strength and reduce stress risers. These rods incorporate graded big-end bearings for proper clearance and bronze small-end bushings to improve longevity. Pistons are cast from OEM-grade alloy and utilize a MOS2 skirt coating alongside hard-anodized crowns and ring grooves, which reduce friction and improve heat resistance for increased wear resistance.