Manley 02+ Acura RSX (K20A-A2-A3) 86mm STD Bore 12.5:1 Dome Piston Set with Rings

When you're rebuilding the engine in your 2002-2006 Acura RSX, especially if you're aiming for more power or durability, a solid set of pistons is key. This set from Manley Performance gives you everything you need to get started: four forged pistons, complete with rings and tool steel wrist pins. These aren't just off-the-shelf parts; they're built with the kind of attention to detail that professional engine builders trust for serious builds.

Manley uses domestic 2618 alloy forgings for these pistons, which means they're strong enough to handle higher compression ratios and increased cylinder pressures. The pistons feature proven cam and barrel skirt profiles designed to generate power efficiently while also being gentle on your cylinder walls, which helps with longevity. They also pay close attention to the ring lands and grooves, machining them to strict standards to ensure a good seal for better power output. The unique fixturing Manley uses allows them to machine the skirt and ring grooves in one operation, ensuring they are perfectly square to each other.

This set is designed for an 86mm standard bore and a 12.5:1 compression ratio, making it a popular choice for naturally aspirated builds looking for a noticeable bump in performance. You'll get the pistons, rings, and premium chrome moly wrist pins all in one package, ready for installation. Just remember, these are not CARB approved and cannot be shipped to California.