CP Piston & Ring Set For Honda/Acura K20A/A2 - Bore 87.0mm 12.5:1 Comp Ratio (Set Of 4 Pistons)

This is a set of four forged pistons and rings from CP Pistons, specifically made for Honda and Acura K20A and K20A2 engines. These pistons are designed to increase the compression ratio to 12.5:1 and have a bore size of 87.0mm, making them a solid choice for engine builds aiming for more power. CP Pistons are well-known in the performance engine world for their robust construction and attention to detail.

Forged pistons like these are made from a single block of aluminum that's heated and hammered into shape under extreme pressure. This process creates a much stronger and more durable piston than cast pistons, which are made by pouring molten aluminum into a mold. The strength of forged pistons is crucial for engines that will be pushed hard, whether on the track or for spirited street driving. The 12.5:1 compression ratio is a significant bump over stock, which will result in a noticeable increase in horsepower and torque when paired with appropriate tuning and supporting modifications. The included rings are also designed to work seamlessly with these pistons to ensure proper sealing and oil control.

When installing these pistons, it's important to ensure your engine block is properly machined to the 87.0mm bore size and that the cylinder walls are honed to the correct finish for optimal ring seal. Because these are high-compression pistons, careful attention to fuel quality and engine management will be necessary to prevent detonation and maximize performance. Please note that this piston set is not CARB approved and cannot be shipped to California.