What is the horsepower rating for this Manley rotating assembly?

With the standard 7/16? ARP 8740 cap screws on the connecting rods, this assembly is rated for up to 900 horsepower. Upgrading to optional ARP 2000 cap screws increases the rating to 1,500 horsepower.

What is included in this Manley rotating assembly?

This assembly includes a 4340 forged steel crankshaft, 4340 forged steel H-beam connecting rods with ARP 8740 cap screws, and 2618 forged aluminum Platinum Series pistons with premium chrome moly wrist pins.

Can this rotating assembly be shipped to California?

No, this part is not CARB approved and cannot be shipped to California due to emissions regulations.

Specifications

Brand: Manley Performance
Part #: 38565RX
UPC: 807298086774

Manley Rotating Assembly, BBC 565 4.250 STROKE/4.600/-3cc

Name: Manley Rotating Assembly, BBC 565 4.250 STROKE/4.600/-3cc
Brand: Manley Performance
SKU: manley-performance-manley-rotating-assembly-bbc-565-4-250-stroke-4-600-3cc-t14-881198
Price: 3905.93 USD
Availability: BackOrder

$3905.93

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Manley Rotating Assembly, BBC 565 4.250 STROKE/4.600/-3cc. Built with 4340 forged steel for up to 1500 HP.

Key Features

This rotating assembly fits BBC engines with a 4.250 inch stroke and 4.600 inch bore.
It includes a 4340 forged steel crankshaft for robust performance.
The assembly comes with 4340 forged steel H-beam connecting rods.
Connecting rods are equipped with 7/16? ARP 8740 cap screws, with an option for ARP 2000.
It features 2618 forged aluminum Platinum Series pistons with a -3cc dish.
Premium chrome moly wrist pins are included with the pistons.

This rotating assembly is designed for BBC engines. Check manufacturer specifications to confirm 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

Starting with a 4340 forged steel crankshaft is key for any serious BBC build. This Manley rotating assembly is designed for the 565 cubic inch displacement, featuring a 4.250 inch stroke and a 4.600 inch bore with a -3cc piston dish. This combination is a popular choice for builders looking to create a powerful big-block Chevrolet engine that can handle significant abuse.

The included 4340 forged steel H-beam connecting rods are a solid choice, coming standard with 7/16? ARP 8740 cap screws. If your build is pushing the limits, you can opt for ARP 2000 cap screws for an even stronger connection, allowing this assembly to reliably handle up to 1,500 horsepower. The 2618 forged aluminum Platinum Series pistons are well-built for high performance, and they come with premium chrome moly wrist pins to ensure durability under extreme conditions.

This assembly is rated for 900 horsepower with the standard ARP 8740 bolts, but upgrading to the optional ARP 2000 bolts raises that ceiling to a formidable 1,500 horsepower. Keep in mind that this part is not CARB approved and cannot be shipped to California. For builders aiming for a high-output BBC, this Manley rotating assembly offers a strong foundation.