Wiseco Pistons K631M87 Pro Tru Forged Piston Set Sport Compact 87mm

The Wiseco K631M87 Pro Tru piston set delivers race-proven forged piston technology for high-performance sport compact engines. This complete set of four pistons is manufactured in Ohio using dedicated forgings and precision CNC machining, resulting in pistons that are both stronger and lighter than conventional cast or hypereutectic alternatives.

Key Features:

• Set of 4 forged pistons with 87mm bore diameter
• Includes pre-gapped plasma moly ring sets (1/16", 1/16", 3/16") and wrist pins
• Recommended ring set: 8700XX for replacement
• Dedicated forging design for optimal strength-to-weight ratio
• Precision CNC machined to exacting tolerances
• Plasma moly rings provide excellent sealing, reduced friction, and extended lifespan
• Available in multiple compression ratios to suit specific engine builds
• American-made quality from Wiseco's Ohio manufacturing facility

Wiseco's Sport Compact Pro Tru line represents exceptional value for engine builders who demand forged piston durability without compromise. The included ring package comes pre-gapped for convenience, while the dedicated forging process ensures each piston maintains the structural integrity needed for high-RPM and forced induction applications. These pistons are ideal for street performance, track day, and competition builds where reliability and power are equally critical.