CP Piston & Ring Set for Honda/Acura K20A/A2 - Bore 86.50mm - Size (+0.5mm) - Compression Ratio 12.5

If you're rebuilding the heart of your Honda or Acura K20A or K20A2 engine, a set of high-performance pistons like these from CP Pistons is a critical component. These pistons are designed to handle increased cylinder pressures and temperatures, making them ideal for builds that demand more power and reliability than stock. With a bore size of 86.50mm and a +0.5mm oversize, they are intended for engines that have been bored out to accommodate them, ensuring a precise fit and optimal sealing.

CP Pistons are well-known for their forged construction, which starts with a block of aerospace-grade aluminum that is heated and hammered into shape under immense pressure. This process creates a much stronger and more durable piston than cast aluminum, giving it a higher resistance to detonation and fatigue. The 12.5:1 compression ratio is a notable increase over stock, which will significantly boost horsepower and torque when paired with appropriate tuning and supporting modifications. These pistons also feature a specific crown design tailored for the K20A/A2 engine to optimize combustion and airflow within the cylinder. The included rings are also designed to work in harmony with the pistons for a solid seal.

When installing these pistons, it's important to ensure your engine block has been professionally machined to the correct bore size and surface finish. Proper balancing of the rotating assembly is also recommended for smooth operation and longevity. Remember that this piston set is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for detailed specifications and recommended clearances.