CP Piston & Ring Set for Acura/Honda K20A/A2/A3 - Bore (89mm) - Size (+3.0mm) - CR 9.0

Starting with a specific bore size of 89mm, this CP Pistons set is built for the Acura RSX models from 2002 to 2006. These are forged pistons, which means they start as a solid block of aluminum that's heated and hammered into shape under immense pressure. This process creates a much stronger and more durable piston compared to cast ones, making them a solid choice for rebuilding or upgrading your K20A, K20A2, or K20A3 engine. The +3.0mm oversize means these pistons are designed to fit cylinders that have been bored out to accommodate them, typically during an engine rebuild to correct wear or increase displacement.

This set features a 9.0:1 compression ratio, which is a common target for naturally aspirated builds or mild forced induction setups. It includes the necessary rings to complete the piston assembly. Because these are an oversize part, they are intended for use in an engine that has already been machined to the correct bore size. This ensures a proper seal and optimal performance from your rebuilt engine.