CP Piston & Ring Set for Audi/VW 1.8L 20 Valve - Bore (81.0mm) - Size (STD) - CR (8.5) - Set of 4

What you get in this box is a complete set of four standard bore (81.0mm) forged pistons and their matching rings, designed for the Audi and Volkswagen 1.8L 20-valve engines. These pistons feature a compression ratio of 8.5:1, making them a solid choice for builds where you might be looking for a bit more boost or a more aggressive camshaft profile than stock. Forged pistons are a significant step up from cast or hypereutectic pistons, especially when you're pushing the limits of your engine.

CP Pistons is well-known for making strong, reliable internal engine components. These pistons are forged from high-strength aluminum, which gives them a much better resistance to detonation and the higher cylinder pressures that come with forced induction or performance tuning. The standard bore size means they're intended to fit right into an engine block that hasn't been bored out yet, simplifying the rebuild process. The included rings are specifically matched to these pistons for proper sealing, which is critical for both performance and engine longevity. If you're rebuilding the top end of your 1.8T and want internals that can handle more power, this set is a popular option.

When you're installing these, remember that proper cylinder wall preparation and ring gap setting are crucial for optimal performance and to prevent premature wear. Always refer to the manufacturer's installation instructions for the most accurate details on fitting these pistons into your specific engine build.