What is the maximum horsepower this rotating assembly can handle?

With the standard 7/16-inch ARP 8740 cap screws on the connecting rods, this assembly is rated for up to 900 horsepower. An optional upgrade to ARP 2000 cap screws increases the capacity to 1,500 horsepower.

What material is the crankshaft made from?

The crankshaft in this assembly is forged from 4340 steel, a material known for its high strength and durability, making it well-suited for high-performance engine applications.

Are the pistons included in this kit compatible with forced induction or nitrous?

The 2618 forged aluminum pistons are designed for high-performance use and are generally suitable for applications involving forced induction or nitrous, especially when paired with the appropriate supporting components and tuning. Consult Manley's technical resources for specific application guidance.

Specifications

Brand: Manley Performance
Part #: 38615RH
UPC: 807298093420

Manley Rotating Assembly, BBC 615 4.625 STROKE/4.600/-3cc

Name: Manley Rotating Assembly, BBC 615 4.625 STROKE/4.600/-3cc
Brand: Manley Performance
SKU: manley-performance-manley-rotating-assembly-bbc-615-4-625-stroke-4-600-3cc-t14-881214
Price: 4001.40 USD
Availability: BackOrder

$4001.40

On Backorder

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Manley Rotating Assembly, BBC 615 4.625 STROKE/4.600/-3cc. Built for high-horsepower BBC builds up to 1500 HP.

Key Features

Verified fitment for BBC (Big Block Chevrolet) engines.
Features a 4.625-inch stroke crankshaft forged from 4340 steel.
Includes 4340 forged steel H-beam connecting rods.
Connecting rods are equipped with 7/16-inch ARP 8740 cap screws, supporting up to 900 horsepower.
Optional ARP 2000 cap screws are available for increased horsepower capacity up to 1,500 HP.
2618 forged aluminum Platinum Series pistons are included.

This rotating assembly is designed for Big Block Chevrolet (BBC) engines. Please consult 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

If you're building a serious big-block Chevrolet engine and need a foundation that can handle serious power, a Manley rotating assembly is a solid choice. This BBC 615 kit is designed for a 4.625-inch stroke and features a -3cc piston dish, making it suitable for a wide range of performance applications where you're aiming for significant horsepower gains.

At the heart of this assembly is a crankshaft forged from 4340 steel, known for its strength and durability under extreme stress. Complementing the crank are H-beam connecting rods, also made from 4340 forged steel. These rods come standard with 7/16-inch ARP 8740 cap screws, capable of handling up to 900 horsepower. For those pushing the limits even further, an upgrade to optional ARP 2000 cap screws is available, allowing this assembly to reliably manage up to 1,500 horsepower.

The pistons in this kit are Manley's Platinum Series, constructed from 2618 forged aluminum. This material is chosen for its excellent strength-to-weight ratio, crucial for high-RPM performance. They come complete with premium chrome moly wrist pins for added durability. This assembly is a well-built package for anyone serious about maximizing the potential of their big-block Chevy.