CP Piston & Ring Set for Audi/VW 1.8L 20V - Bore (81.5mm) - CR (8.5:1) - Set of 4

This is a set of four forged pistons and rings from CP Pistons, specifically made for the Audi and Volkswagen 1.8L 20V engine. These pistons feature an 81.5mm bore and a compression ratio of 8.5:1, making them a solid choice for rebuilding or upgrading the engine in your performance-oriented Audi or VW. CP Pistons is well-known for producing strong, reliable engine components for demanding applications.

Forged pistons are built from a solid block of aluminum that's heated and hammered into shape, which creates a much stronger and more durable part than cast pistons. This strength is crucial for engines that see higher cylinder pressures, whether from forced induction like turbochargers or superchargers, or simply from a higher-performance tune. The 8.5:1 compression ratio is a good balance for many performance builds, offering a noticeable increase in power over stock while still being manageable with pump gasoline in many setups. This set includes the necessary rings to complete the piston installation.

When rebuilding an engine, especially one that's been modified or is being built for increased performance, using high-quality pistons like these from CP Pistons is essential for long-term reliability. Ensure you consult the manufacturer's installation instructions for proper piston-to-wall clearance and ring gap settings, as these are critical for engine health and performance. This set is not CARB approved and cannot be shipped to California.