CP Piston & Ring Set for Honda K20A/A2 - Bore 90.0mm - Size (+4.0mm) - Compression Ratio 11.5

If you're rebuilding the engine in your 2002-2004 Acura RSX, especially for performance applications, a set of quality pistons is key. This set from CP Pistons is built for the K20A and K20A2 engines, offering a 90.0mm bore size. These are a +4.0mm oversize set, meaning they are designed to replace pistons that have been bored out by 4 millimeters from the original factory size. This is common when an engine needs a significant overhaul or when building for increased displacement.

CP Pistons are well-known for their forged construction, which makes them much stronger and more durable than cast pistons. This strength is crucial for handling the increased cylinder pressures that come with higher compression ratios, like the 11.5:1 ratio these pistons achieve. This compression ratio is a notable bump over stock and is intended to improve power output when paired with appropriate tuning and supporting modifications. The set includes the necessary rings to complete the piston assembly.

Keep in mind that these pistons are an oversize part, so they are intended for engines that have already been bored out to 90.0mm. If your engine has not been bored, you would need a different size. Also, please note that this part is not CARB approved and cannot be shipped to California.