Brand New 440 Big Bore (89mm) Top End Rebuild Kit. Includes a new 89mm aftermarket cylinder. Includes a new 89mm Namura 11:1 piston kit (piston, rings, wrist pin, circlips). Includes a top end gasket kit. 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.