Manley 28555RX Big Block Chevy CID Rotating Assembly Stroke Bore Flat Top - 555 4.250 4.560 3cc

The Manley 28555RX is a complete Big Block Chevy 555 cubic inch rotating assembly engineered for serious street and race performance. Built around a 4.250" stroke and 4.560" bore with -3cc flat top pistons, this kit delivers a low-compression 9.4:1 ratio (with 118cc heads) and is precision internally balanced by Manley in-house. It is designed for use with a standard 9.800" deck block.

Key Features:

• Crankshaft: Manley 4340 non-twist lightweight forged steel 4.250" crankshaft — heat treated, stress relieved, shot peened, nitrided, and 100% magnafluxed
• Connecting Rods: Manley 4340 forged steel H-beam 6.385" rods with 7/16" ARP 2000 cap screws — rated to 1,500 HP; also heat treated, stress relieved, shot peened, nitrided, and 100% magnafluxed
• Pistons: Manley 2618 forged aluminum Platinum Series 4.560" bore, 1.395" compression height, -3cc flat top design (PN 696360)
• Wrist Pins: Manley premium chromoly wrist pins included
• Rings & Bearings: High performance piston rings and Clevite "H" Series rod bearings and "P" Series main bearings included
• Balance: Precision internally balanced to within +/-1% of bobweight by Manley in-house
• Deck Height: Requires a 9.800" deck block
• Horsepower Rating: 1,500 HP with ARP 2000 cap screws

The Manley 28555RX rotating assembly gives engine builders a factory-matched, ready-to-install foundation for a high-displacement BBC build. All major components are forged from premium alloys and subjected to rigorous quality processes, making this kit suitable for demanding street/strip and competition applications.