These piston sets increase displacement for all Golf 2, Jetta 2 and B3 Passat models using 2.0L 16V 9A engines. Designed to retain the stock 92.8mm crank stroke and 144mm connecting rod length. Stock 10.8:1 compression ratio best suited for normally aspirated engines and nitrous motors. Lower 9:1 compression ratio ideal for forced induction (turbocharging or supercharging) applications. Piston weights range from 286-294 grams!Prices include pistons, rings, wrist pins and clips.Note: Oversize pistons require boring the cylinder block.