Wiseco 6649M85 Honda B-Series Forged Piston Bore Dish Shelf Stock - 85mm 10cc

The Wiseco 6649M85 is a high-performance forged shelf stock piston engineered specifically for Honda B-Series engines. Featuring an 85.00 mm bore and a -10cc dish crown with a 1.181 in. compression height, this piston is designed to deliver reliable power output in performance street and race builds.

Wiseco's shelf stock pistons are manufactured from 2618 high-strength aluminum alloy and forged and machined at Wiseco's facility in Mentor, Ohio. The -10cc dish design helps manage compression ratios when used in forced induction or high-compression naturally aspirated Honda B-Series applications. Each piston features fully machined crown geometry and precision ring grooves for consistent ring seal and long-term durability.

Key Features:

• Bore Diameter: 85.00 mm (3.346 in.)
• Crown Design: -10cc Dish
• Compression Height: 1.181 in. (30.00 mm)
• Pin Diameter: 0.8268 in. (21.00 mm)
• Material: 2618 high-strength forged aluminum alloy
• ArmorGlide® Skirt Coating for seizure resistance, friction reduction, and quieter piston operation
• Precision ring grooves and fully machined crown features
• Shelf stock availability — no custom lead time required