Wiseco Honda K-Series +10.5cc Dome 1.181x87.0mm SINGLE PISTON

If you're rebuilding the heart of your Honda K-series engine, especially for demanding performance applications, a strong set of pistons is crucial. This Wiseco piston is built from 2618 aluminum, which offers improved tensile strength over other aluminum alloys, making it well-suited for the stresses of high-performance builds. The 87.00mm bore size and +10.5cc dome volume are specific to certain K20A engine configurations, helping to achieve a desired compression ratio when paired with the right cylinder head and gasket combination.

Wiseco machines these pistons in the USA, paying close attention to details like precision ring grooves, anti-detonation grooves, and features that improve ring seal. This helps ensure efficient combustion and reduces the risk of detonation, which is critical in boosted or high-compression engines. The piston crown is also fully machined for a clean, consistent surface. For added durability and reduced friction, the piston skirts are coated with ArmorGlide, which helps prevent seizure, lowers friction, and contributes to quieter operation.

This piston also features forced pin oiling, meaning oil is actively directed to the wrist pin for better lubrication and longevity under heavy load. While this piston is designed for severe duty, remember it is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.