Manley 28598HXX BBC 598 CI Rotating Assembly 4.500 Stroke 4.600 Bore -3cc Flat Top

The Manley 28598HXX is a complete Big Block Chevy (BBC) 598 cubic inch rotating assembly engineered for high-output street and racing applications. Built around a 4.500-inch stroke and a 4.600-inch bore, this kit delivers the displacement and bottom-end strength demanded by serious engine builders targeting the popular 598 CID combination.

At the heart of the assembly is a 4340 forged steel crankshaft, renowned for its tensile strength and resistance to stress fatigue under extreme horsepower loads. Paired with 4340 forged steel H-Beam connecting rods featuring 7/16" ARP 8740 cap screws (with optional ARP 2000 upgrade), the rotating assembly is designed to withstand power levels up to 900 HP with standard hardware and up to 1,500 HP with the ARP 2000 option.

The pistons are Manley Platinum Series 2618 forged aluminum flat-top design with a -3cc dish volume, providing a clean, near-flat piston crown ideal for achieving precise compression ratios in tall-deck BBC builds. Premium Chrome Moly wrist pins are included.

Key Features:

• 4340 forged steel crankshaft — 4.500" stroke
• 4340 forged steel H-Beam connecting rods — 6.700" length
• 7/16" ARP 8740 cap screws standard; ARP 2000 optional
• Manley Platinum Series 2618 forged aluminum pistons — 4.600" bore
• -3cc flat-top piston design for precise compression tuning
• Premium Chrome Moly wrist pins included
• Rated to 900 HP (ARP 8740) or 1,500 HP (ARP 2000 optional)
• Designed for Big Block Chevy tall-deck (10.200") applications
• Kit requires professional balancing prior to installation

Manley Performance has been a trusted name in high-performance engine internals since 1966, producing components used in everything from street builds to professional racing programs. The 28598HXX rotating assembly is an ideal foundation for a powerful BBC stroker build.