Cylinder Piston Gaskets Top End Rebuild Kit For Yamaha Grizzly 450 Rhino 450Cylinder Piston Gasket Top End Rebuild Kit 84. 5mm Fit For Yamaha Grizzly Kodiak Rhino Wolverine 450 Features: If your cylinder blows through, the compression is too low, or even a piston seizure has occurred, then this kit is exactly the right thing for you. Kit includes cylinder, piston, rings, pin, clips & top end gasket kit (you get exactly what is pictured). The cylinder is made of aluminum for good cooling with an internal cast iron jacket