Wiseco 6566M815 Pro Tru Sport Compact Forged Piston 81.5mm Bore +5cc Dome

The Wiseco 6566M815 is a Pro Tru Sport Compact Series forged replacement piston featuring an 81.5mm bore and a +5cc dome design. Engineered and manufactured in Mentor, Ohio, this piston delivers race-proven performance and superior strength for high-output sport compact builds.

Key Features:

• Forged aluminum construction — produced from 4032 or 2168 aluminum alloy using dedicated forgings specific to the final piston shape, resulting in a stronger and lighter piston than industry standards
• CNC-machined to final configuration — precision-machined by skilled craftsmen using state-of-the-art equipment for consistent tolerances and optimal fit
• Plasma moly ring package included — pre-gapped 1/16", 1/16", 3/16" ring set (compatible with Wiseco ring set 8150XX) for excellent combustion seal, reduced friction, and long service life
• Chromoly wrist pins and Spirolox retainers included — no need to source additional hardware
• +5cc dome crown — supports higher compression ratio tuning for performance engine builds
• Strutt support design — enhances piston rigidity under high cylinder pressures including forced induction applications
• Sold individually — purchase the quantity needed for your specific build

Wiseco Pro Tru Sport Compact pistons are designed for engine builders who demand maximum performance and precise compression ratio control. The included plasma moly ring set and chromoly wrist pins make this a complete, ready-to-install solution. Recommended ring set: 8150XX.