Brand New Top End Engine Rebuild Kit. Includes (2) SPI pistons, rings, wrist pins, circlips, wrist pin bearings, and a top end gasket kit.Pistons are for the standard bore (68mm). High-quality cast piston made with excellent materials to precise specifications. Made from hypereutectic alloy for extra strength and reduced expansion. (Teflon/Molybdenum) coated skirts perform at the highest standards, reducing friction and heat for added power and longevity. Anodized piston dome for increased protection against excessive heat. Rings match and interchange with the OEM design.