Wiseco 6649M84 Honda B-Series 84mm Forged Piston -10cc Dish Shelf Stock

The Wiseco 6649M84 is a single shelf-stock forged performance piston engineered for Honda B-Series engines. Featuring an 84mm (3.307") bore and a -10cc dish crown, this piston is designed to work with VTEC and non-VTEC B-Series builds where a lower compression target is desired — making it an excellent choice for forced induction applications. With a compression height of 1.181" (30mm) and a 21mm pin diameter, it matches the dimensional requirements of popular B-Series strokes and rod combinations.

Key Features:

• 84mm Bore — 3.307" diameter for standard or lightly overbored B-Series blocks
• -10cc Dish Crown — Reduces compression ratio; ideal for turbocharged and supercharged builds
• 1.181" (30mm) Compression Height — Correct geometry for B-Series rod and stroke combinations
• 21mm Pin Diameter — Matches OEM-style and performance wrist pin sizing for the B-Series platform
• 2618 Forged Aluminum Construction — High-tensile forged alloy for superior strength under extreme heat and pressure
• ArmorGlide® Skirt Coating — Reduces friction, improves wear resistance, and enables quieter piston operation
• ArmorPlating™ Crown Treatment — Hard anodized crown surface that reduces heat buildup and resists detonation damage
• Shelf Stock Single Piston — Sold individually; ideal for replacement or custom mixed-bore builds
• CNC-machined ring grooves with tight tolerances for consistent ring seal

Wiseco pistons are engineered, forged, and machined at their facility in Mentor, Ohio, and are built to exceed the demands of high-performance and race applications. The 6649M84 is a reliable, competition-proven component for B-Series engine builders seeking a durable, low-compression forged piston solution.