The Wiseco K542M81 Professional Series Honda B18 forged racing pistons are engineered for serious racers and high-performance builders seeking durable and reliable engine components. Crafted from premium 2618 aluminum in the USA, these pistons offer superior tensile strength and resilience for heavy to severe duty applications. The precision-machined crown and fully machined features ensure optimal fit and performance, making them ideal for demanding race environments.

Features such as precision ring grooves, an anti-detonation groove, and enhanced ring seal improve combustion efficiency and reduce the risk of knocking. The ArmorGlide skirt coating significantly reduces seizure, friction, and noise, extending piston life and ensuring smooth operation during intense racing conditions. The pistons also incorporate forced pin oiling to enhance durability under high-stress loads, providing racers with confidence and consistent performance.

Designed specifically for Honda B18 engines with an 81mm bore, these pistons include a 29.85mm compression height and a 0.8268-inch pin diameter, making them suitable for high-performance applications. This set of four pistons is perfect for custom race builds or rebuilds that require robust, precision-engineered components. Backed by Wiseco’s reputation for quality, the K542M81 pistons are a critical upgrade for racers aiming to push their engines to the limit while maintaining reliability and efficiency.

Features:

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