What is the horsepower rating for this rotating assembly?

With the standard ARP 8740 cap screws on the connecting rods, this assembly is rated for up to 900 horsepower. If you opt for the ARP 2000 cap screws, the rating increases to 1,500 horsepower.

What materials are the crankshaft, rods, and pistons made from?

The crankshaft and connecting rods are constructed from strong 4340 forged steel. The pistons are made from 2618 forged aluminum, and they come with premium chrome moly wrist pins.

Specifications

Brand: Manley Performance
Part #: 29565H
UPC: 807298080574

Manley Rotating Assembly, BBC 565 4.250 STROKE/4.600/+43cc

Name: Manley Rotating Assembly, BBC 565 4.250 STROKE/4.600/+43cc
Brand: Manley Performance
SKU: manley-performance-manley-rotating-assembly-bbc-565-4-250-stroke-4-600-43cc-t14-880930
Price: 4072.77 USD
Availability: BackOrder

$4072.77

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Manley Performance BBC 565 rotating assembly with a 4.250" stroke. Built for serious power applications.

Key Features

Fits Big Block Chevrolet (BBC) engines for 565 cubic inch displacement.
Features a 4.250-inch stroke and a 4.600-inch bore with +43cc piston dish.
Includes a 4340 forged steel crankshaft for robust performance.
Comes with 4340 forged steel H-beam connecting rods.
Standard rods use 7/16-inch ARP 8740 cap screws, rated for up to 900 horsepower.
Optional ARP 2000 cap screws allow for support up to 1,500 horsepower.

This rotating assembly is designed for Big Block Chevrolet (BBC) engines with a 565 cubic inch displacement, 4.250-inch stroke, and 4.600-inch bore. Please verify compatibility with your specific engine build.

⚠️ 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

If you're building a big-block Chevrolet engine for serious power, this Manley rotating assembly is a solid foundation. It's designed for a 565 cubic inch displacement, featuring a 4.250-inch stroke and a 4.600-inch bore with a +43cc piston dish. This assembly is engineered to handle substantial horsepower, making it a popular choice for performance builds.

At the heart of this kit is a 4340 forged steel crankshaft, known for its strength and durability under high stress. Paired with it are 4340 forged steel H-beam connecting rods. These rods come standard with 7/16-inch ARP 8740 cap screws, capable of handling up to 900 horsepower. For even higher output, you can opt for ARP 2000 cap screws, which allow this assembly to reliably support up to 1,500 horsepower.

The pistons are Manley's Platinum Series, made from 2618 forged aluminum for a good balance of strength and light weight. They include premium chrome moly wrist pins, which are crucial for handling the intense forces within a high-performance engine. Keep in mind that this assembly is not CARB approved and cannot be shipped to California. It's a well-built package for those looking to maximize their BBC's potential.