The Piston Rings Set - Standard size 78mm for MITSUBISHI K4F, a premium quality piston ring set designed to provide optimum performance and durability for your engine. This set includes 1 complete piston ring set of 4 cylinder, ensuring a reliable and efficient operation of your engine. Highlights Engine Model : MITSUBISHI K4F OEM# : MM433921 Piston Bore (mm) : 78mm Size : STD Ring Size (mm) : 78 x 2.5HK x 2 x 4 Brand : Riken Taiwan Package Include : 1 Complete Piston Ring Set of 4 Cylinders