CP Piston & Ring Set for Porsche 964/993 3.8L - Bore (102mm) - Compression Ratio (12.5)

This is a set of forged pistons and rings from CP Pistons, specifically made for the 3.8L engine found in Porsche 964 and 993 models. These pistons are designed to replace your original equipment and are built for performance applications. They feature a 102mm bore and a 12.5:1 compression ratio, which is a notable increase over stock, meaning you'll get more power out of your engine, especially when paired with appropriate tuning and fuel. CP Pistons are well-known in the performance engine building community for their strong construction and precision manufacturing.

Forged pistons are made from a solid block of aluminum alloy that is heated and hammered into shape under extreme pressure. This process creates a much denser and stronger grain structure than cast pistons, making them significantly more resistant to the high pressures and temperatures found in performance engines. This particular set is designed for a 102mm bore, which is the standard size for the 3.8L variant of these engines, and includes rings specifically matched to the piston design. The 12.5:1 compression ratio is a popular choice for naturally aspirated builds looking for an improved power output without going to extreme levels that might require race fuel. It’s important to note that this piston set is not CARB approved and cannot be shipped to California.

When rebuilding or upgrading your Porsche 964 or 993 engine, using high-quality internal components like these forged pistons is crucial for reliability and performance. Ensure you have the correct supporting modifications, such as engine management tuning, to take full advantage of the increased compression ratio and the strength of these pistons. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.