What is the horsepower capability of this rotating assembly?

With the standard 7/16? ARP 8740 cap screws, this assembly is rated for up to 750 horsepower. If you opt for the optional ARP 2000 cap screws, the horsepower range is increased to 1,500 HP.

What is included in 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 #: 290300R
UPC: 807298068787

Manley Rotating Assembly, SBC 434 4.000 STROKE/+4cc DOME

Name: Manley Rotating Assembly, SBC 434 4.000 STROKE/+4cc DOME
Brand: Manley Performance
SKU: manley-performance-manley-rotating-assembly-sbc-434-4-000-stroke-4cc-dome-t14-881253
Price: 3636.56 USD
Availability: BackOrder

$3636.56

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, SBC 434 4.000 STROKE/+4cc DOME. Built for serious power, handling up to 1500 HP.

Key Features

Fits Small Block Chevy engines.
Features a lightweight 4340 forged steel crankshaft with a 4.000-inch stroke.
Includes 2618 forged aluminum Platinum Series pistons with a +4cc dome and Premium Chrome Moly wrist pins.
Comes with strong 4340 forged steel H-beam connecting rods.
Standard configuration uses 7/16? ARP 8740 cap screws and supports up to 750 horsepower.
Optional ARP 2000 cap screws are available, allowing the assembly to handle up to 1,500 horsepower.

This rotating assembly is designed for Small Block Chevy engines. Please consult with a professional or refer to 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 lightweight 4340 forged steel crankshaft, this Manley rotating assembly is built for serious performance. It features a 4.000-inch stroke, designed to increase displacement and power potential for your Small Block Chevy engine. The 2618 forged aluminum Platinum Series pistons are included, featuring a +4cc dome to help achieve your desired compression ratio, and they come with Premium Chrome Moly wrist pins for durability.

Complementing the crankshaft and pistons are 4340 forged steel H-beam connecting rods. These rods are incredibly strong and come standard with 7/16? ARP 8740 cap screws. If you're pushing the limits, you can opt for ARP 2000 cap screws, which allow this assembly to handle an impressive horsepower range of up to 1,500 HP, compared to the 750 HP rating with the standard ARP 8740 screws. This assembly is a well-built foundation for a high-performance engine build.

Please note that this assembly is not CARB approved and cannot be shipped to California. It's important to check all manufacturer specifications and ensure proper assembly and tuning for optimal performance and longevity.