Manley 29572HXX BBC Rotating Assembly Stroke Bore Dome - 572 4.250 4.625 43cc

The Manley 29572HXX is a complete Big Block Chevy (BBC) 572 cubic inch rotating assembly built for high-horsepower street and racing applications. This kit pairs a 4.250-inch stroke crankshaft with a 4.625-inch bore and features +43cc dome pistons, designed to deliver aggressive compression ratios suitable for forced induction and naturally aspirated performance builds.

Key Features:

• 4340 Forged Steel Crankshaft — Non-twist lightweight forged construction; heat treated, stress relieved, shot peened, nitrided, and 100% Magnaflux inspected for maximum reliability
• 4340 Forged Steel H-Beam Connecting Rods — 6.385" length with 7/16" ARP 8740 cap screws standard; optional ARP 2000 cap screws available for up to 1,500 hp
• 2618 Forged Aluminum Platinum Series Pistons — +43cc dome profile at 4.625" bore; paired with premium chromoly wrist pins for superior strength under high heat and stress
• Total Seal Piston Rings — File-fit rings included for precise gap setting during final assembly
• Clevite "H" Series Bearings — Narrowed rod bearings and "P" or "H" Series main bearings included for high-load performance
• Precision Internally Balanced — The complete assembly is precision balanced in-house by Manley
• Horsepower Rating — Rated up to 900 hp with ARP 8740 cap screws; up to 1,500 hp with optional ARP 2000 cap screws
• 2-Piece Rear Main Seal Design — Compatible with standard BBC 2-piece rear seal blocks

Designed for 9.800" standard deck Big Block Chevy blocks, the Manley 29572HXX rotating assembly gives engine builders a fully matched, quality-tested bottom end foundation. Manley's decades of racing heritage and in-house manufacturing processes — including nitriding, shot peening, and Magnaflux testing — ensure every component meets the demands of serious performance builds.