Auto Barn
Est. 1957
Manley Performance

Manley Rotating Assembly, BBC 555 4.250 STROKE/4.560/+43cc

$4101.35

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Manley Rotating Assembly, BBC 555 4.250 STROKE/4.560/+43cc. Supports up to 1500 HP.

Key Features

  • This rotating assembly includes a 4340 forged steel crankshaft, 4340 forged steel H-beam connecting rods, and 2618 forged aluminum Platinum Series pistons.
  • The connecting rods are equipped with 7/16? ARP 8740 cap screws, with an option for ARP 2000 cap screws.
  • Premium chrome moly wrist pins are included with the 2618 forged aluminum pistons.
  • This assembly is rated for up to 900 horsepower when using the standard ARP 8740 cap screws.
  • With the optional ARP 2000 cap screws, the horsepower range is increased to 1,500.
  • The assembly features a 4.250-inch stroke and a 4.560-inch bore with +43cc 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

This Manley rotating assembly includes a 4340 forged steel crankshaft, 4340 forged steel H-beam connecting rods, and 2618 forged aluminum Platinum Series pistons. The connecting rods come with 7/16? ARP 8740 cap screws, with an option for ARP 2000 cap screws for increased strength. The pistons also include premium chrome moly wrist pins.

This assembly is built for serious power. With the standard ARP 8740 cap screws on the rods, it's rated for up to 900 horsepower. If you opt for the ARP 2000 cap screws, this rotating assembly can handle an impressive 1,500 horsepower. The 4.250-inch stroke and 4.560-inch bore with a +43cc piston volume are key dimensions for building a potent 555 cubic inch BBC engine.

Please note that this assembly is not CARB approved and cannot be shipped to California. It is designed for high-performance applications where robust internal engine components are essential for reliability and power output.

Specifications

Brand
Manley Performance
Manufacturer Part #
29555HXX
UPC
807298087429

Frequently Asked Questions

Manley Rotating Assembly, BBC 555 4.250 STROKE/4.560/+43cc

$4101.35