Wiseco 6573M865 Pro Tru Sport Compact Forged Replacement Piston Bore - 86.5mm

The Wiseco 6573M865 is a Pro Tru Sport Compact Series individual replacement forged piston with an 86.5mm bore, engineered for high-performance sport compact engine builds. Designed for engine builders who need a single replacement piston to match an existing Pro Tru set, this piston is built to the same exacting standards as the full kit.

Key Features:

• Forged in the USA — manufactured by skilled craftsmen in Mentor, Ohio using state-of-the-art forging presses and CNC machining equipment
• Dedicated forgings — purpose-built to the final piston shape for superior strength-to-weight ratio compared to industry-standard cast or generic forged alternatives
• 86.5mm bore diameter — fits applications requiring the M865 bore size
• Rings and wrist pin included — comes complete and ready for installation
• Compatible ring set: Wiseco 8650XX plasma moly pre-gapped ring package (1/16", 1/16", 3/16")
• Pre-gapped plasma moly rings — deliver excellent cylinder seal, reduced friction, and extended service life
• Multiple compression ratio volumes available — allows precise CR selection for your specific engine build

Wiseco's Pro Tru line represents the best value in American-made forged performance pistons, trusted by engine builders across naturally aspirated and forced induction sport compact platforms. Recommended ring set: Wiseco 8650XX.