Wiseco 6640M88 Pro Tru Sport Compact Forged Piston with Rings and Pin

The Wiseco 6640M88 is part of the Pro Tru Sport Compact Series — a line of high-performance forged pistons engineered for sport compact engines. Designed as a replacement or individual piston, this unit is American-made and built to outperform cast piston alternatives in both strength and weight savings.

Key Features:

• Forged construction — manufactured using state-of-the-art forging presses and CNC machines by skilled craftsmen in Ohio, USA
• Dedicated forgings specific to the final piston shape, resulting in a stronger and lighter piston compared to industry-standard designs
• Rings and pin included — comes complete with a plasma moly ring package in a 1/16", 1/16", 3/16" pre-gapped configuration for excellent combustion sealing, friction reduction, and long service life
• 88mm bore diameter — precision machined to 88mm for a proper fitment in compatible sport compact applications
• Multiple compression ratio volumes available — Pro Tru pistons are offered in a variety of dome/dish volumes, allowing engine builders to dial in the exact compression ratio required
• Recommended ring set: 8800XX — compatible replacement ring set if rings need to be sourced separately

Wiseco's Pro Tru Sport Compact line delivers exceptional value in the forged piston category, combining race-proven engineering with everyday affordability. Whether building a street performance motor or a dedicated track car, the 6640M88 provides the reliability and precision that Wiseco is world-renowned for.