WISECO FIX KIT Replacement pistons (these are the taller pistons) to use with your existing spacer plate and longer bolts. High performance top end gasket kit contains high performance head and base gaskets plus intake and exhaust gaskets. Designed for cylinder rebuild and piston replacement. SPI Pistons are for standard bore size 85.00mm.Dual ring pistons are engineered to provide the best possible path for combustion chamber heat transfer to the cylinder walls. All pistons, rings, pins and circlips are manufactured to OEM specifications. All individual components are interchangeable with original parts.