Upgrade your Honda B16A engine with the Wiseco K566M81AP Professional Series forged piston set, designed for serious racing and high-performance applications. Crafted from 2618 aluminum in the USA, these pistons offer exceptional tensile strength and durability, making them ideal for heavy-duty race builds. The set includes four pistons with an 81.00 mm bore diameter, a 30.10 mm compression height, and a 0.827-inch pin diameter, ensuring precise fitment and reliable performance. Each piston features a fully machined crown for optimal combustion efficiency and precision ring grooves that enhance sealing, reducing blow-by and improving power output. The anti-detonation groove further contributes to engine durability by preventing knocking under high compression conditions, while the ArmorGlide skirt coating minimizes friction, reduces seizure risk, and promotes quieter operation during intense driving conditions. Designed to withstand severe duty, these pistons are equipped with forced pin oiling to ensure consistent lubrication and long-term reliability.
Whether you're building a race-ready engine or upgrading for maximum performance, Wiseco's Professional Series pistons deliver custom-level performance and durability. Manufactured with quality craftsmanship and precision engineering, this piston set is a dependable choice for competitive racing and high-performance street applications. Ensure your engine's top-tier performance with Wiseco's proven forged pistons that remove limits and push boundaries.

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-enhancing features
• ArmorGlide skirt coating provides seizure resistance, friction reduction, and quieter operation
• Designed and built to withstand heavy to severe duty performance applications
• Fully machined crown features for optimal combustion efficiency
• Forced pin oiling ensures consistent lubrication and durability