Manley 39582HX Big Block Chevy Rotating Assembly Stroke Bore Dome - 582ci 4.375 4.600 43cc

The Manley 39582HX is a complete rotating assembly kit for Big Block Chevy engines, displacing 582 cubic inches with a 4.375" stroke and 4.600" bore. This fully balanced, all-forged rotating assembly is built to handle serious horsepower, making it an ideal foundation for high-output street, strip, and race engine builds.

What's Included:

• 4340 Forged Steel Crankshaft – 4.375" stroke with center counterweights; designed for standard deck blocks
• 4340 Forged Steel H-Beam Connecting Rods – 6.535" length; fitted with 7/16" ARP 8740 cap screws (ARP 2000 cap screws optional for higher HP builds)
• 2618 Forged Aluminum Platinum Series Pistons – 4.600" bore, +43cc dome profile; includes premium Chrome Moly wrist pins
• Total Seal Piston Rings
• Clevite HX Series Main Bearings – narrowed H-Series rod bearings and HX-Series main bearings included

Key Specifications:

• Displacement: 582 ci (9.5L)
• Stroke: 4.375"
• Bore: 4.600"
• Connecting Rod Length: 6.535"
• Piston Type: +43cc Dome
• Compression Ratio: 13.50:1 with 124cc head
• Rear Main Seal: 2-Piece
• Bearing Set: HX Series (included)
• Factory Balanced: Yes, to +/- 1% of bobweight
• Harmonic Balancer: Not included
• Flexplate/Flywheel: Not included

Horsepower Ratings:

• 900 HP with standard ARP 8740 cap screws
• 1,500 HP with optional ARP 2000 cap screws

Manley's rotating assemblies are engineered for performance builders who demand precision-matched components right out of the box. Every crankshaft undergoes heat treatment and nitriding for maximum strength and fatigue resistance, while the Platinum Series pistons are forged from 2618 alloy aluminum — the preferred choice for high-boost and high-RPM applications.