Wiseco 6544M87 Pro Tru Sport Compact Forged Piston 87mm Bore Honda H22

The Wiseco 6544M87 is a Pro Tru Sport Compact Series forged replacement piston designed for Honda H22 engines running sleeved bores. With an 87.00 mm (3.425 in.) bore diameter, this dish-top piston is engineered for high-performance sport compact builds that demand strength, precision, and reliability. It is sold as an individual piston, making it an ideal solution for single-cylinder replacement or custom engine builds.

Forged and machined at Wiseco's facility in Mentor, Ohio, the 6544M87 uses dedicated forgings shaped specifically to the final piston geometry. This approach produces a piston that is both stronger and lighter than conventional alternatives, without inflating cost. Ring grooves measure 1.0mm, 1.2mm, and 2.8mm, and the piston ships complete with rings, pins, and clips — everything needed for a thorough rebuild.

Key Features:

• Forged dish-top piston with 87.00 mm (3.425 in.) bore diameter
• Sport Compact Pro Tru Series — individual/replacement piston
• Requires sleeved bores
• Ring grooves: 1.0mm, 1.2mm, 2.8mm
• Includes plasma moly pre-gapped ring set (1/16, 1/16, 3/16) for excellent seal and friction reduction
• Includes wrist pins and clips — complete kit for engine rebuild
• Recommended ring set: 8700XX
• Precision machined ring grooves minimize blow-by and oil consumption
• ArmorGlide skirt coating reduces friction, extends piston life, and allows tighter dimensional tolerances
• American made — forged and machined in Mentor, Ohio

The Pro Tru Sport Compact line delivers an outstanding balance of forged performance and value for builders working with Honda H22-based platforms. Whether refreshing a worn cylinder or building a performance engine from the ground up, the Wiseco 6544M87 provides the precision and durability that demanding applications require.