CP Piston & Ring Set for Audi/VW 1,8L 20 Valve - Bore (82.0mm) - Size (+1.0) - CR (9.5) - Set of 4

This is a set of four forged pistons and matching rings from CP Pistons, specifically made for Audi and Volkswagen 1.8L 20-valve engines. These pistons are designed to be 1.0mm oversize from the factory bore, measuring 82.0mm, and feature a 9.5:1 compression ratio. This set is intended for builders who are looking to refresh or upgrade the engine internals, often as part of a performance build or a significant engine overhaul.

CP Pistons are known for their robust construction, and these are no exception. Forged from high-strength aluminum alloy, these pistons are built to withstand the higher pressures and temperatures found in performance applications. The 9.5:1 compression ratio is a popular choice, offering a good balance between power output and drivability for many modified engines. The included rings are designed to seal effectively against the cylinder walls, ensuring proper compression and oil control. Because these are an oversize piston, they are intended for engines that have been bored out to match the 82.0mm dimension, typically to clean up cylinder walls that have wear or damage.

When installing these pistons, it's important to follow the manufacturer's recommended clearances and lubrication procedures. Since these are an oversize part, the engine block will need to be machined to the correct bore size before installation. This set includes the pistons and rings needed to replace all four cylinders. Please note that this part is not CARB approved and cannot be shipped to California.