What is the recommended horsepower range for this rotating assembly?

This Manley rotating assembly is rated for up to 900 horsepower when using the standard ARP 8740 cap screws. With the optional ARP 2000 cap screws, the assembly can safely handle up to 1,500 horsepower.

What specific engine configuration does this assembly fit?

This assembly is designed for Big Block Chevrolet (BBC) engines with a 4.600-inch bore and a 4.250-inch stroke, resulting in a 565 cubic inch displacement.

Does this rotating assembly come balanced?

Rotating assemblies typically require balancing by a professional engine builder to match specific components like the flywheel and harmonic balancer. Always consult Manley's installation instructions for proper balancing procedures.

Specifications

Brand: Manley Performance
Part #: 28565RX
UPC: 807298089676

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-t14-881065
Price: 3826.24 USD
Availability: BackOrder

$3826.24

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 for high-horsepower BBC builds.

Key Features

Fits BBC engines with a 4.600-inch bore and 4.250-inch stroke.
Features a 4340 forged steel crankshaft for robust strength.
Includes 4340 forged steel H-beam connecting rods with 7/16" ARP 8740 cap screws.
Optional ARP 2000 cap screws are available for increased horsepower capacity.
Comes with 2618 forged aluminum Platinum Series pistons.
Includes premium chrome moly wrist pins for durability.

This rotating assembly is designed for BBC (Big Block Chevrolet) engines with a 4.600-inch bore and 4.250-inch stroke. It is not CARB approved and cannot be shipped to California.

⚠️ 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 centers around that strong foundation, giving you the core components needed to handle significant power. The 4.250-inch stroke combined with the 4.600-inch bore size creates a 565 cubic inch displacement, a popular choice for big-block Chevy performance applications where torque and horsepower are paramount.

Complementing the crankshaft are the 4340 forged steel H-beam connecting rods. These are fitted with 7/16-inch ARP 8740 cap screws, a well-known standard for strength and reliability. If your build targets the upper end of the power spectrum, you can opt for ARP 2000 cap screws for even greater clamping force and durability. The assembly also includes 2618 forged aluminum Platinum Series pistons, designed for high-performance use and paired with premium chrome moly wrist pins for robust operation under extreme conditions. This combination is rated for up to 900 horsepower with the standard ARP 8740 bolts, and can safely handle up to 1,500 horsepower when equipped with the optional ARP 2000 cap screws.

When assembling a high-performance engine like this, it's crucial to ensure all components are balanced and installed according to manufacturer specifications. This rotating assembly is designed for builders aiming for substantial power output, and while it's not CARB approved, it represents a solid choice for many performance engine projects outside of California. Always refer to Manley's detailed installation instructions for proper assembly and balancing procedures.