Computer engineered piston skirt profiles minimal cylinder wall friction. Anti-detonation grooves and new ring land diameter eliminates ring blow-by while maximizing engine performance. Piston kit includes 1 - Piston, 1 - Ring Set, 1 - Wristpin, and 1 - Circlip Set unless otherwise noted in the "Notes:" above. Oversize kits require cylinder boring or sleeving. Top end bearing not included in kit.