CP Piston & Ring Set for Audi/VW 1,8L 20 Valve - Bore (81.5mm) - Size (+0.5) - CR (9.5) - Set of 4

Forged from high-strength aluminum alloy, these CP Pistons are built to handle the demands of a performance 1.8L 20-valve engine. The 81.5mm bore size, combined with a +0.5mm oversize, is crucial for engines that have been bored out during a rebuild, ensuring a proper seal and optimal compression. With a compression ratio of 9.5:1, these pistons are designed to work well with various engine builds, offering a good balance between power and drivability.

Each piston in this set of four is precision-machined to CP Pistons' exacting standards. The forged construction means they are significantly stronger and more durable than cast pistons, making them a solid choice for builds aiming for increased horsepower or sustained high-performance use. The included rings are selected to complement the pistons, helping to ensure a tight seal against the cylinder walls for efficient combustion and reduced oil consumption.

When rebuilding or modifying your Audi or VW 1.8L 20-valve engine, choosing the right pistons is fundamental. These CP Pistons offer a well-built solution for those who need reliable, performance-oriented components. Remember that these pistons are not CARB approved and cannot be shipped to California. Always refer to your engine builder's specifications and the manufacturer's installation instructions for proper fitment and assembly procedures.