CP Piston & Ring Set for Audi/VW 1.8L 20 Valve - Bore (82.5mm) - Size (+1.5) - CR (8.5) - Set of 4

CP Pistons is well-known for building strong, reliable internal engine components for high-performance applications. This piston and ring set is a prime example, designed for Audi and VW 1.8L 20-valve engines. If you're rebuilding the top end of one of these popular engines, especially if you're looking to handle more power or refresh a worn-out engine, this set is a solid choice.

This particular set features pistons with a bore size of 82.5mm, which is 1.5mm over the standard bore size. This is often done to clean up cylinder walls that have minor damage or wear, or to increase displacement slightly. The compression ratio is listed at 8.5:1, making these suitable for builds where you might be using forced induction like a turbocharger or supercharger, as this lower compression helps prevent detonation under boost. The set includes four pistons and their corresponding rings, ready for installation.

When installing these pistons, it's important to ensure your cylinder bores are properly honed to match the piston skirt design and to allow for correct oil film adhesion. Always refer to the manufacturer's installation instructions for precise clearances and procedures. This set is not CARB approved and cannot be shipped to California.