Manley 39555RX Big Block Chevy 555ci Rotating Assembly Kit 4.250" Stroke 4.560" Bore 43cc

The Manley 39555RX is a complete Big Block Chevy (BBC) rotating assembly stroker kit engineered to build a high-displacement 555 cubic inch powerplant. Featuring a 4.250" stroke and designed for a 4.560" bore, this kit delivers the displacement and rotating mass needed for serious street, strip, or marine performance builds. The included pistons feature a 43cc dish to help dial in target compression ratios when paired with your choice of cylinder heads.

Key Features:

• Application: Big Block Chevrolet (BBC) engine family
• Displacement: 555 cubic inches
• Stroke: 4.250 inches
• Bore Size: 4.560 inches
• Piston Dish: 43cc dish for compression ratio flexibility
• Kit Type: Complete rotating assembly (RX series)
• Manley's RX series assemblies are precision-balanced and matched for reduced build time and improved reliability
• Components manufactured to tight tolerances for optimal ring seal and long service life

Manley Performance has been a trusted name in high-performance engine components for decades. The 39555RX rotating assembly is an ideal foundation for a BBC 555 stroker build, saving builders significant time over sourcing and balancing individual components. Whether you're building a bracket race motor, a high-output street engine, or a marine powerplant, this kit provides a proven, performance-ready rotating assembly.