Wiseco Acura K20 K24 FLAT TOP 1.181X86MM Piston Shelf Stock Kit

Starting with the 2618 aluminum construction, these Wiseco pistons are forged and machined in the USA. This material choice is key because it offers improved tensile strength, which is critical when you're pushing your K20 or K24 engine hard. The 86mm bore size is a common specification for many performance builds, and these are designed as a flat-top piston, meaning they sit flush with the deck of the cylinder block when installed, which is important for calculating compression ratios.

Wiseco has packed these pistons with features for serious builders. You'll find precision ring grooves, anti-detonation grooves, and other features designed to improve ring seal. This helps ensure that combustion pressure stays where it belongs, contributing to better performance and engine longevity. They also include forced pin oiling, which means the wrist pin bore is drilled to allow oil to flow directly to it, keeping it lubricated under high stress. The crown is fully machined, and the piston skirts are treated with an ArmorGlide coating. This coating is designed to reduce friction, resist seizure, and operate more quietly, all important factors in a high-performance engine.

This set includes four pistons, along with premium rings, ready for installation in your 2002-2006 Acura RSX. These are built for heavy to severe duty applications, so if you're rebuilding your top end for serious performance, these are a solid option to consider.