Manley 28555X BBC 555 Stroker Rotating Assembly Kit 4.250 Stroke 4.560 Bore -3cc

The Manley 28555X is a complete Big Block Chevy (BBC) 555 cubic inch stroker rotating assembly kit designed for high-performance engine builds. Engineered for serious power applications, this kit combines precision-matched components to deliver the displacement increase and reliability demanded by racing and high-performance street engines.

This kit is built around a 4.250-inch stroke crankshaft paired with 4.560-inch bore pistons featuring a -3cc dish, allowing builders to optimize compression ratio when combined with their choice of cylinder heads. Manley's exacting tolerances and premium materials ensure proper component balance and long-term durability under high-stress operating conditions.

Key Features:

• Application: Big Block Chevrolet (BBC) engine platform
• Target Displacement: 555 cubic inches
• Crankshaft Stroke: 4.250 inches
• Piston Bore Diameter: 4.560 inches
• Piston Dome: -3cc (slight dish for compression tuning flexibility)
• Designed as a matched rotating assembly kit for balanced performance
• Built to Manley's high-performance manufacturing standards
• Ideal for race, street/strip, and high-output engine builds

Manley Performance has been a trusted name in high-performance engine components for decades, producing connecting rods, pistons, crankshafts, valvetrain parts, and complete rotating assemblies for professional engine builders and serious enthusiasts. The 28555X stroker kit is an excellent foundation for a powerful, reliable 555 BBC build.