Wiseco Acura 4v Domed +8cc STRUTTED 86.5MM Piston Shelf Stock Kit

If you're rebuilding the engine in your 2002-2006 Acura RSX, especially if you're aiming for more power or refreshing a high-mileage powerplant, a solid set of pistons is crucial. This Wiseco shelf stock piston kit is built for that purpose, featuring 86.5mm pistons designed to fit your RSX's 4-valve engine. These pistons have a domed top with an +8cc volume, which is a common setup for naturally aspirated builds or mild forced induction applications where you want to maintain a good compression ratio without going too extreme.

Wiseco is well-known for its forged pistons, and this kit is no different. Forging is a process that shapes aluminum under extreme pressure, creating a much stronger and more durable piston than cast alternatives. This strength is important because pistons have to withstand the intense heat and pressure inside the combustion chamber. The 'strutted' design refers to internal bracing within the piston, further increasing its rigidity and resistance to flexing or cracking under load. At 86.5mm, these are a stock bore size for many RSX engines, making them a straightforward replacement or upgrade during an engine overhaul. This kit includes everything you need to get your engine rebuilt with these robust pistons.

When installing these pistons, it's important to follow the manufacturer's recommended clearances and lubrication procedures. Proper ring gap setting and piston orientation are key to ensuring longevity and performance. This kit is designed as a shelf stock replacement, meaning it's a popular and well-tested configuration for the RSX engine. Please note that this kit is not CARB approved and cannot be shipped to California.