LA Sleeve Cylinder Rebuild Kit LAS-5477K One boxed component kit provides the foremost compatible top-end rebuild solution The Moly2000 centrifugally spun-cast cylinder sleeved iron bore provides better ring seal for better compression, more torque and more horsepower 2-stroke kits are packaged complete with wear resistant Moly2000centrifugally spun-cast cylinder sleeve, matching pro-forged or pro-casted piston kit, wrist pin bearing and complete top-end gasket set 4-stroke kit includes everything in the 2-stroke kit plus complete top-end gasket set and valve stem seals