Wiseco 6587M90 Pro Tru Sport Compact Forged Piston 90mm Bore

The Wiseco 6587M90 is a Sport Compact Pro Tru Series forged replacement piston with a 90.0mm (3.543 in.) bore, designed for high-performance sport compact engine builds. Part of Wiseco's renowned Pro Tru lineup, this individual piston delivers race-proven durability and precision at an exceptional value for the performance engine builder.

American-Made Forged Construction: Wiseco Pro Tru pistons are forged and CNC-machined by skilled craftsmen in Ohio using state-of-the-art forging presses. Each piston uses a dedicated forging specific to its final shape, resulting in a component that is stronger and lighter than industry-standard cast alternatives.

Key Features:

• Sport Compact Pro Tru Series — purpose-built for sport compact performance applications
• Forged aluminum construction — superior strength and durability over cast pistons
• 90.0mm (3.543 in.) bore diameter
• Rings and wrist pin included — plasma moly pre-gapped ring package (1/16, 1/16, 3/16) for excellent seal, friction reduction, and long service life
• Recommended ring set: 9000XX (sold separately)
• Replacement/individual piston — ideal for single-cylinder replacement or custom builds
• Available in a variety of dome volumes to achieve a precise target compression ratio
• Dedicated forgings minimize excess material and machining for optimal strength-to-weight ratio

Whether you're rebuilding a single cylinder or assembling a complete sport compact performance engine, the Wiseco 6587M90 Pro Tru piston offers the quality and precision that Wiseco is world-renowned for — made in the USA.