CP Piston & Ring Set for Audi/VW 1.8L 20V 82.5mm Bore +1.5mm Size 86.4mm Stroke 8.5:1 CR - Set of 4

If you're rebuilding the engine in your Audi or VW with the 1.8L 20V engine, a solid set of pistons is crucial for reliable performance. This set from CP Pistons is built for that job, featuring a 82.5mm bore and a 1.5mm oversize to help you get back to spec or achieve a specific build goal. The 8.5:1 compression ratio is a good balance for many performance applications, offering a noticeable bump in power without making the engine overly sensitive to fuel quality.

These pistons are forged, meaning they start as a solid block of aluminum that's heated and hammered into shape. This process creates a much stronger and more durable piston than cast ones, making them a popular choice for engines that see harder use or are being built for more power. The 86.4mm stroke specification is important to note for your build calculations. CP Pistons are well-known in the performance engine world for their robust construction and attention to detail, ensuring these pistons will hold up under pressure.

This set includes four pistons and their corresponding rings, ready for installation. Remember that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.