Wiseco 6628M875 Pro Tru Sport Compact Forged Piston 87.5mm

The Wiseco 6628M875 is a Pro Tru Sport Compact Series forged piston, designed for performance engine builders who demand strength, precision, and value. Manufactured in the USA by skilled craftsmen in Ohio, this replacement piston is forged and CNC-machined using dedicated forgings specific to the final piston shape — resulting in a component that is both stronger and lighter than standard industry pistons.

Key Features:

• American-made forged piston — manufactured in Ohio with state-of-the-art forging presses and CNC machines
• Dedicated forgings — shape-specific forgings produce a superior strength-to-weight ratio vs. generic blanks
• Plasma moly ring package included — pre-gapped 1/16", 1/16", 3/16" ring set provides excellent combustion seal, reduced friction, and extended service life
• Wrist pin included — complete assembly-ready kit; rings and pins included
• Multiple compression ratio volumes available — allows the engine builder to dial in the exact compression ratio needed
• Recommended ring set: Wiseco 8750XX (sold separately if replacement rings are needed)
• 87.5mm bore diameter — precision-machined to spec for consistent fitment

Wiseco's Pro Tru line is the ideal choice for sport compact engine builds seeking the performance benefits of a true forged piston at a competitive price point. Backed by Wiseco's decades of race-proven piston engineering, the 6628M875 delivers reliability and performance whether used in a street build or a high-output competition application.