Polaris Ranger RZR 4 800, RZR S 800 & More ProX Engine Rebuild Kit

• Complete rotating and reciprocating rebuild kit including crankshaft assembly, main bearings and seals, pistons and components, and a complete engine gasket kit

• All components were developed through extensive research and development on ProX’s in-house engine dyno

• Crankshafts come completely assembled using Maxima assembly lube and are inspected in-house for proper dimensions and trueness

• Connecting rods feature proprietary design done in-house, and are forged, heat-treated, and shot-peened for ultimate tensile strength and reduced stress risers

• Connecting rods include graded bearings in the big end to ensure proper clearance, as well as a bronze bushing in the small end, both improving longevity and performance

• Pistons are cast from OEM-grade alloy and feature MOS2 skirt coating and hard-anodized crown and ring grooves for improved performance and wear resistance through reduced friction and improved heat resistance

• Includes Japanese-sourced, Koyo main bearings along with OEM quality seals and complete gasket kit to ensure a reliable engine rebuild

• More applications covered in fewer part numbers with versatile gasket kits and compression ratios

• Available in A/B/C graded bore sizes

Part Number: 10.EK5805.A