Wiseco Pistons Kit - 8.8:1Cr - 86mm Bore - Honda - K20Z/K20ASpecifications:Manufacturer Brand: WisecoPart Number: K568M86Compression Ratio: 8.8:1Bore (mm): 86 ( Std.)Stroke (mm): 86Rod Length (mm): 139Pin Diameter (mm): 22Compression Height (mm): 30Block Height (mm): 212Piston weight (Gr): 290 Replacement Parts:Pin: S550Rings: 8600XXLocks: Wiseco pistons are made from dedicated forgings produced in-house to give you a light weight piston with superior strength and optimal design. Being the multivalve piston technology leader, the line features specially designed valve pockets, complex dome and crown shapes, the steel nitride/napier xx rings and optimized skirt profiles. The pistons come standard with ArmorGlide® coating material for reduced friction and noise, freeing up horsepower.See More