Airsal 50cc M-Racing cylinder kit, complete with all necessary parts, such as gasket set, piston, piston rings, etc. M-Racing for Minarelli AM, non-T6, but almost identical. 2-Piece outlet with MAHLE piston (2 rings). Aluminium with hard-chromed bore. Performance-wise, up there with 70cc cylinders, but with different timing options. Good torque and acceleration.