CP Piston & Ring Set for Honda K20A/A2 - Bore 88mm - +2.0mm Over Size - Compression Ratio 12.5

CP Pistons is a well-known name in high-performance engine components, especially for demanding builds. This forged piston and ring set is designed for Honda K20A and K20A2 engines, offering a significant upgrade for those looking to rebuild or enhance their engine's performance. This set features a bore size of 88mm, which is 2.0mm over the standard size, allowing for increased displacement and potential power gains when paired with other modifications. The compression ratio is set at a high 12.5:1, which is ideal for naturally aspirated builds seeking maximum power output, or for boosted applications where careful tuning is applied.

Forged pistons like these are built from a solid block of aluminum alloy that is heated and hammered into shape under extreme pressure. This process creates a much stronger and more durable piston than cast alternatives, making them resistant to the higher stresses and temperatures found in performance engines. The 2.0mm oversize means these pistons are intended for engines that have already been bored out to accommodate them, typically during an engine rebuild where cylinder walls might be worn or to increase overall engine volume. The included rings are designed to work in harmony with the pistons and the cylinder walls to ensure proper sealing, which is critical for compression and oil control.

When undertaking an engine rebuild with these pistons, it's important to ensure all supporting components are up to the task. This includes proper balancing of the rotating assembly, appropriate camshafts, and a fuel and ignition system capable of handling the increased compression and airflow. Due to the high compression ratio and intended use in performance applications, these pistons are not CARB approved and cannot be shipped to California. Always consult your engine builder or a qualified mechanic for specific installation requirements and tuning recommendations for your build.