Manley 39572 BBC Rotating Assembly Stroke Bore Dome Pistons - 572ci 4.250 4.625 43cc

The Manley 39572 is a complete Big Block Chevy (BBC) rotating assembly engineered for the 572 cubic inch displacement combination, featuring a 4.250-inch stroke and 4.625-inch bore. Designed for standard deck blocks, this assembly delivers the foundation for serious street and racing power builds and is factory balanced to within +/- 1% of bobweight.

Key Components Included:

• Crankshaft: Manley 4340 forged steel crankshaft (P/N 190290) — heat treated, stress relieved, shot peened, nitrided, and 100% magnafluxed with micro-polished large radius journals
• Connecting Rods: 4340 forged steel H-Beam connecting rods, 6.385-inch length (P/N 14062), with 7/16" ARP 8740 cap screws (ARP 2000 cap screws available as an upgrade)
• Pistons: 2618 Platinum Series forged aluminum dome pistons, +43cc (P/N 697890), 4.625-inch diameter, with premium chromoly wrist pins
• Rings: High-performance piston rings (.043", 3/16" file fit)
• Bearings: Clevite® "H" Series narrowed rod bearings and "P" or "H" Series main engine bearings

Assembly Specifications:

• Displacement: 572 cubic inches
• Stroke: 4.250 inches
• Bore: 4.625 inches
• Rod Length: 6.385 inches
• Piston Dome Volume: +43cc
• Compression Ratio Range: 13.3:1 – 15.1:1 (depending on head gasket and deck clearance)
• Horsepower Rating: Up to 900 hp with ARP 8740 cap screws; up to 1,500 hp with optional ARP 2000 cap screws
• Block Type: Standard deck
• Ring Size: 46459

Crankshaft Features:

• Multi-step heat treatment process for maximum strength and durability
• Nitrided surface for superior hardness and wear resistance
• Shot peened and stress relieved for long service life
• 100% magnaflux inspected for quality assurance
• Gun-drilled and lightened rod journals for reduced rotating mass
• Micro-polished large radius journals (narrowed rod bearings required)

The Manley 39572 rotating assembly is a premium, ready-to-install solution for builders demanding proven strength and precision in a BBC 572 stroker application. Optional "X" Series rod bearings with .001" extra clearance can be ordered by adding "X" to the assembly part number; optional "HX" Series main bearings with .001" extra clearance are available by adding "HX" to the assembly part number. Note: Manley crankshafts are not intended for use with highly boosted roots-style cog belt superchargers. Manley products are sold without warranty due to their intended performance use.