Manley 28598HX BBC 598ci Rotating Assembly 4.500 Stroke 4.600 Bore -3cc Flat Top HX Bearings

The Manley 28598HX is a complete Big Block Chevy (BBC) 598 cubic inch rotating assembly engineered for high-performance street and racing applications. This kit is built around a 4.500-inch stroke and a 4.600-inch bore, featuring -3cc flat top pistons for efficient combustion chamber fill in tall deck block applications. The "HX" designation indicates this assembly is upgraded with optional HX Series main bearings featuring .001" extra clearance for improved oil flow and bearing life under high-load conditions.

Key Features:

• 4340 Forged Steel Crankshaft – Heat treated, stress relieved, shot peened, nitrided, and 100% magnafluxed for maximum strength and durability
• 4340 Forged Steel H-Beam Connecting Rods – 6.700" length with 7/16" ARP 8740 cap screws; rated to 900 HP standard or 1,500 HP with optional ARP 2000 cap screws
• 2618 Forged Aluminum Platinum Series Pistons – -3cc flat top design with premium chrome moly wrist pins; compatible with tall deck BBC block configurations
• HX Series Main Bearings – Clevite® H Series rod bearings (narrowed) and upgraded HX Series main bearings with .001" extra oil clearance
• High-Performance Piston Rings – Included for a complete, ready-to-assemble rotating package
• Micro-Polished Large Radius Journals – Requires narrowed rod bearings, as included in this kit

Designed for tall deck Big Block Chevy blocks (10.200" deck height), this assembly delivers the displacement and strength needed for demanding race and high-performance street builds. Factory balanced to within +/- 1% of bobweight, the 28598HX provides a solid foundation for a powerful 598ci BBC engine build.