CP Piston & Ring Set for Acura/Honda K20A/A2/A3 - Bore (86.5mm) - Size (+0.5mm) - Compression Ratio

CP Pistons is well-known for making strong internal engine components, and this forged piston and ring set is a prime example of their work for your 2002-2006 Acura RSX. If you're rebuilding the engine in your RSX, especially if you're looking to push the performance envelope or are dealing with worn-out original pistons, this set is built to handle the demands of a high-performance K-series engine. These pistons are designed for the K20A, K20A2, and K20A3 engine codes, which are found in your specific RSX model.

This set features pistons with a bore size of 86.5mm, which is a +0.5mm oversize. This means they are intended for an engine block that has been bored out to this larger diameter, typically done during an engine rebuild to restore cylinder integrity or to increase displacement. The forged construction is a key advantage here; unlike cast pistons, forged pistons are shaped from a solid block of aluminum alloy under extreme pressure. This process aligns the metal's grain structure, resulting in a much stronger and more durable piston that can withstand higher cylinder pressures and temperatures without deforming or failing. This makes them ideal for modified engines or those that see frequent hard use.

When you're undertaking an engine rebuild of this caliber, it's important to ensure all components are compatible and installed correctly. This set includes the pistons and rings, ready for installation into your K-series engine. Remember that these pistons are an oversize part, so your engine block will need to be machined to the specified 86.5mm bore diameter by a qualified machine shop before installation. Due to their performance-oriented design and construction, these pistons are not CARB approved and cannot be shipped to California.