Auto Barn
Est. 1957
Manley Performance

Manley Rotating Assembly, BBC 572 4.250 STROKE/4.625/+43cc

$4181.04

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Manley BBC 572 Rotating Assembly, 4.250 Stroke/4.625 Bore. Built for serious power up to 1500 HP.

Key Features

  • The crankshaft is forged from 4340 steel for strength.
  • Includes 4340 forged steel H-beam connecting rods with 7/16-inch ARP 8740 cap screws.
  • 2618 forged aluminum Platinum Series pistons are included, featuring premium chrome moly wrist pins.
  • This assembly can support up to 900 horsepower with the standard ARP 8740 cap screws.
  • With the optional ARP 2000 cap screws, the horsepower range is increased to 1,500.
  • Features a 4.250-inch stroke and a 4.625-inch bore with 43cc dish pistons.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

Forged from 4340 steel, the crankshaft in this Manley rotating assembly is built to handle serious stress. This BBC 572 assembly is designed for builders looking to push the limits of big-block Chevrolet performance, featuring a 4.250-inch stroke and a 4.625-inch bore with a 43cc dish piston. It’s a well-built foundation for a high-horsepower engine build.

The connecting rods are also forged from 4340 steel, configured as H-beams and equipped with 7/16-inch ARP 8740 cap screws. For those aiming for the upper echelon of power, an upgrade to ARP 2000 cap screws is available, allowing this assembly to support up to 1,500 horsepower. The pistons are Manley's Platinum Series, forged from 2618 aluminum and include premium chrome moly wrist pins, ensuring they can withstand the demands of high compression and combustion pressures.

This rotating assembly is a robust choice for a performance engine build where reliability and strength are paramount. It’s important to note that this assembly is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's detailed specifications for complete build requirements and recommendations.

Specifications

Brand
Manley Performance
Manufacturer Part #
39572HXX
UPC
807298087122

Frequently Asked Questions

Manley Rotating Assembly, BBC 572 4.250 STROKE/4.625/+43cc

$4181.04