What is the horsepower rating for this rotating assembly?

With the standard 7/16-inch ARP 8740 cap screws, this assembly is rated for up to 750 horsepower. If you upgrade to the optional ARP 2000 cap screws, the rating increases to 1,500 horsepower.

What material are the crankshaft and connecting rods made from?

The crankshaft is forged from 4340 steel, and the connecting rods are also forged from 4340 steel in an H-beam design for strength and durability.

What is included with this 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.

Specifications

Brand: Manley Performance
Part #: 290200
UPC: 807298068732

Manley Rotating Assembly, SBC 434 4.000 STROKE/-20cc DISH

Name: Manley Rotating Assembly, SBC 434 4.000 STROKE/-20cc DISH
Brand: Manley Performance
SKU: manley-performance-manley-rotating-assembly-sbc-434-4-000-stroke-20cc-dish-t14-881119
Price: 3414.57 USD
Availability: BackOrder

$3414.57

On Backorder

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

Manley Performance is known for well-built performance engine components. This SBC 434 rotating assembly features a 4" stroke for increased displacement.

Key Features

Fits Small Block Chevy (SBC) engines.
Creates a 434 cubic inch displacement with a 4.000-inch stroke crankshaft.
Includes a lightweight 4340 forged steel crankshaft.
Comes with 4340 forged steel H-beam connecting rods with 7/16" ARP 8740 cap screws.
Features 2618 forged aluminum Platinum Series pistons with premium chrome moly wrist pins.
Rated for 750 horsepower with ARP 8740 bolts, or 1,500 horsepower with optional ARP 2000 cap screws.

This rotating assembly is designed for Small Block Chevy (SBC) engines. Compatibility with specific engine blocks, bores, and other components should be verified by the installer.

⚠️ 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

Manley Performance has a long history of making solid engine parts for racers and performance builders. This rotating assembly is built for a Small Block Chevy (SBC) and is designed to create a 434 cubic inch engine when combined with the right block and bore. It features a 4.000-inch stroke crankshaft, which is longer than a stock SBC crank, giving you more displacement and potential for torque and horsepower.

The crankshaft is forged from 4340 steel, a strong material that can handle the stresses of high-performance engines. Paired with it are 4340 forged steel H-beam connecting rods. These rods are known for their strength and reliability, and they come with 7/16-inch ARP 8740 cap screws, with an option to upgrade to ARP 2000 screws for even more strength. The pistons are forged aluminum from Manley's Platinum Series, designed for durability and performance, and they include premium chrome moly wrist pins.

This assembly is rated for up to 750 horsepower with the standard ARP 8740 bolts, and can handle up to 1,500 horsepower if you opt for the ARP 2000 cap screws. Keep in mind that this assembly is not CARB approved and cannot be shipped to California. You'll want to ensure you have the correct block, bore, and supporting components to complete your engine build.