What is the horsepower rating for this rotating assembly?

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

What type of pistons are included in this kit?

This kit includes 2618 forged aluminum Platinum Series pistons. They are flat-top pistons with a -4cc dish and come with premium chrome moly wrist pins.

Specifications

Brand: Manley Performance
Part #: 290135
UPC: 807298068695

Manley Rotating Assembly, SBC 383 3.750 STROKE/-4cc FLAT

Name: Manley Rotating Assembly, SBC 383 3.750 STROKE/-4cc FLAT
Brand: Manley Performance
SKU: manley-performance-manley-rotating-assembly-sbc-383-3-750-stroke-4cc-flat-t14-881234
Price: 3300.88 USD
Availability: BackOrder

$3300.88

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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 383 3.750 STROKE/-4cc FLAT. Built for high-horsepower builds up to 1500 HP.

Key Features

Fits Small Block Chevy (SBC) engines.
Features a lightweight 4340 forged steel crankshaft with a 3.750-inch stroke.
Includes 4340 forged steel H-beam connecting rods with 7/16-inch ARP 8740 cap screws.
2618 forged aluminum Platinum Series pistons are included, with premium chrome moly wrist pins.
Rated for up to 750 horsepower with standard ARP 8740 cap screws.
Can handle up to 1,500 horsepower with optional ARP 2000 cap screws.

This rotating assembly is designed for Small Block Chevy (SBC) 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 lightweight 4340 forged steel crankshaft is key for this Manley rotating assembly. This SBC 383 stroker kit is designed for serious performance builds, offering a 3.750-inch stroke and -4cc flat-top pistons. It’s a well-built foundation for engines aiming for significant power output.

The connecting rods are also forged from 4340 steel in an H-beam design, a strong choice for handling the stresses of high RPM and combustion pressures. They come equipped with 7/16-inch ARP 8740 cap screws, which are rated for up to 750 horsepower. If your build is targeting even higher power levels, you have the option to upgrade to ARP 2000 cap screws, pushing the assembly's capability to a notable 1,500 horsepower. The included 2618 forged aluminum pistons are part of Manley's Platinum Series, featuring premium chrome moly wrist pins for added durability under load.

This assembly is a solid option for anyone rebuilding or building a high-performance Small Block Chevy engine. Keep in mind that this part is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper assembly and torque specifications.