The Wiseco K673M81AP professional series forged racing pistons are engineered for high-performance Honda B16A engines, ideal for serious racers and engine builders seeking durability and maximum power. Crafted from 2618 aluminum in the USA, these pistons offer enhanced tensile strength to withstand heavy-duty and severe performance applications. The precision-machined crown and fully machined features ensure optimal fit and performance. 

Built for demanding racing conditions, these pistons include features such as precision ring grooves, an anti-detonation groove, and superior ring seal technology to improve combustion efficiency and reduce blow-by. The ArmorGlide skirt coating minimizes seizure risk, reduces friction, and promotes quieter operation, contributing to extended engine life and consistent performance. Forced pin oiling ensures reliable lubrication of the piston pins during high-stress operation. 

Designed for use with Honda B16A engines, these pistons require a .040-inch gasket and are supplied as a set of four, making them suitable for rebuilds or upgrades in sport compact racing applications. Wiseco’s professional series pistons are built to push the limits of your engine’s potential, offering a combination of strength, precision, and performance for competitive racing and high-performance street use.

Features:

• Engineered, forged, and machined in the USA from 2618 aluminum for improved tensile strength
• Precision ring grooves, anti-detonation groove, and additional ring seal improving features
• ArmorGlide skirt coating for seizure resistance, friction reduction, and quieter operation
• Designed and built to withstand heavy to severe duty performance applications
• Fully machined crown features for precise fit and durability
• Forced pin oiling for reliable lubrication during high-stress operation