Wiseco 6634M87 Pro Tru Sport Compact Forged Piston Individual Replacement - 87mm

The Wiseco 6634M87 is an individual replacement piston from the Pro Tru Sport Compact Series, featuring an 87mm bore diameter and engineered for high-performance sport compact engine applications. Designed for engine builders who need a single piston replacement, this unit is built to the same exacting standards as Wiseco's full piston sets. The recommended ring set for this piston is the Wiseco 8700XX; rings and wrist pins are included.

American-Made Forged Construction:

• Forged and machined at Wiseco's Mentor, Ohio facility using state-of-the-art forging presses and CNC machines
• Dedicated forgings specific to the final piston shape result in a lighter, stronger piston compared to industry standards
• Advanced forging process with extensive heat-treating and finishing for maximum strength and minimum variance

Sport Compact Pro Tru Features:

• 87mm bore diameter for sport compact engine fitment
• Crown thickness and ring lands engineered to handle power adders including turbos, superchargers, and nitrous oxide
• Specially designed multivalve pockets, complex dome and crown geometry, and optimized skirt profiles
• Includes plasma moly 1/16, 1/16, 3/16 pre-gapped ring package for excellent seal, reduced friction, and extended service life
• Wrist pins and Spirolox retainers included
• Available in multiple compression ratio volumes to allow the engine builder to dial in the exact compression ratio needed

The Wiseco Pro Tru Sport Compact line delivers exceptional value in forged piston technology, backed by decades of race-winning experience. Wiseco part number 6634M87; compatible ring set: 8700XX.