Manley 29555HX Big Block Chevy Rotating Assembly Stroke Bore Dome - 555 4.250 4.560 43cc

The Manley 29555HX is a complete Big Block Chevy 555 cubic inch rotating assembly engineered for serious street and race applications. Built around a 4.250-inch stroke and a 4.560-inch bore, this stroker kit displaces 555 cubic inches and is paired with +43cc dome pistons for elevated compression ratios suited to high-performance builds.

At the heart of this assembly is a Manley 4340 forged steel crankshaft delivering the strength and torsional stiffness required under extreme load. Complementing the crank are Manley 6.385-inch H-Beam connecting rods, designed to withstand the rod loads associated with high-horsepower Big Block Chevy applications. The forged dome pistons are engineered to match the 9.800-inch deck height configuration.

Key Features:

• Engine Family: Big Block Chevy (BBC)
• Displacement: 555 cubic inches
• Crankshaft Stroke: 4.250 inches
• Piston Bore: 4.560 inches
• Piston Dome: +43cc dome
• Crankshaft Material: 4340 forged steel
• Connecting Rods: Manley H-Beam, 6.385-inch length
• Deck Height: 9.800 inches
• MPN: 29555HX

The Manley 29555HX rotating assembly provides a system-matched foundation for builders targeting maximum power output from a Big Block Chevy platform. All components are manufactured by Manley Performance to exacting tolerances, ensuring proper fit and long-term durability in demanding street strip and race environments.