Wiseco 6557M87 Pro Tru Sport Compact Forged Piston 87mm Bore Nissan SR20DE

The Wiseco 6557M87 is a Pro Tru Sport Compact Series forged replacement piston designed for the Nissan SR20DE engine, featuring an 87.00 mm bore and a compression height of 32.00 mm (1.260 in.) with a 0.866 in. pin diameter. Sold as an individual piston, it is backed by Wiseco's decades of race-winning expertise in high-performance sport compact engine development.

Manufactured in Ohio using state-of-the-art forging presses and CNC machining equipment, the 6557M87 is built from dedicated forgings shaped to the final piston geometry — resulting in a component that is both stronger and lighter than conventional industry-standard pistons. This American-made construction ensures consistent quality and tight dimensional tolerances across every unit.

Key Features:

• 87.00 mm bore with 32.00 mm compression height
• 0.866 in. pin diameter for precise fitment
• Forged and CNC-machined in the USA by skilled craftsmen
• Dedicated forgings matched to final piston shape for superior strength and reduced weight
• Includes rings and wrist pin — everything needed for a complete rebuild
• Compatible recommended ring set: 8700XX
• Plasma moly 1/16, 1/16, 3/16 pre-gapped ring package included for excellent seal, friction reduction, and long service life
• Available in multiple compression volumes for precise compression ratio tuning

The Pro Tru Sport Compact line delivers outstanding value in forged piston technology, making it an ideal choice for performance builders seeking a reliable, high-quality forged piston at a competitive price point.