Wiseco 6631M86 Pro Tru Sport Compact Forged Piston 86mm Bore

The Wiseco 6631M86 is a Pro Tru Sport Compact Series forged piston engineered for performance-oriented sport compact engine builds. Manufactured in the USA by skilled craftsmen using state-of-the-art CNC machines and dedicated forging presses, this individual replacement piston delivers the strength and precision that Wiseco is known for worldwide.

Wiseco's Sport Compact Pro Tru line uses dedicated forgings specific to the final piston shape, resulting in a piston that is both stronger and lighter than industry-standard cast or hypereutectic alternatives. The 86mm bore diameter piston is precision-machined to tight tolerances for optimal ring seal and long service life.

Key Features:

• 86mm bore diameter forged piston for sport compact applications
• Forged and CNC-machined in the USA from high-strength aluminum alloy
• Rings and wrist pins included — complete piston assembly ready for installation
• Plasma moly ring package — 1/16, 1/16, 3/16 pre-gapped for excellent seal, friction reduction, and long service life
• Available in a variety of compression volumes to allow the engine builder to dial in the exact compression ratio
• Dedicated forgings reduce weight while improving structural integrity over industry standards
• Recommended ring set: 8600XX

The Wiseco Pro Tru Sport Compact piston line represents outstanding value in forged piston technology, combining race-proven construction with an accessible price point for serious street and track builds.