Cylinder Head Overhaul Mat Piston Rings Gasket End Kit for TRX RANCHER 420 4x4 MANUAL SHIFT TRX420 FM8-6 2008 Material: purity aluminum Bore: 86.5mm Special Features: Engine Parts No.of Cylinders: 1 Cylinder Displacement (ml): 420cc This end kit is designed for use with select ATV models from 2008, specifically those with the TRX420 FM8-6 configuration and 4x4 manual shift variants.It includes a cylinder head overhaul mat, piston rings, and gasket components necessary for rebuilding the engine's upper assembly.The aluminum construction supports effective heat dissipation and maintains structural integrity under operating stress.With a bore diameter of 86.5mm, the kit dimensional compatibility for proper sealing and combustion efficiency. The kit fits models such as the 420 4x4 manual shift, 420 4x4 PS, and EPE9 variants.Installation is intended to restore engine performance and compression levels.The piston is formed using pressure die casting, resulting in dense material structure and reduced thermal expansion.It can endure temperatures up to 300℃, Important Notice: This aftermarket part is unaffiliated with brands.Model mentions indicate fitment only.