81mm Std Bore Pistons Rings Pins Clips included. 8.5-1 compression ratio. (For 220mm blocks and 144mm rods) Set of 4 Pistons. Std Pistons for Mk1 and Fox with "JH", "UM", & "JN" engine code. OEM Part Number 026107065Q. Made by Metal Leve (OEM Brazil)