Wiseco Honda K-Series +10.5cc Dome 1.181x86.5mm Piston Shelf Stock Kit

Forged from 2618 aluminum, these Wiseco pistons are built for the demands of serious racing and performance builds in Honda K-Series engines. The +10.5cc dome design is specifically engineered to work with K20A engine configurations, helping to achieve a desired compression ratio for improved power output. Each piston is precision machined in the USA, ensuring that critical dimensions and features are held to tight tolerances.

Wiseco has incorporated several design elements to enhance durability and performance under severe duty conditions. This includes anti-detonation grooves and additional ring seal features to maintain compression and prevent blow-by, even under high boost or extreme operating temperatures. The ArmorGlide skirt coating is applied to reduce friction, resist seizure, and contribute to quieter operation, which is especially beneficial in high-revving performance engines. The crown of each piston is also fully machined, and the design includes forced pin oiling to ensure adequate lubrication to the wrist pin area, a common stress point in performance applications.

This shelf stock kit includes four pistons, ready for installation in your K20A engine. While these pistons are designed for heavy to severe duty race applications, please note they are not CARB approved and cannot be shipped to California. For optimal results and longevity, always refer to the manufacturer's installation instructions and recommended assembly procedures.