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Eagle Chevrolet Small Block 5140 Steel I-Beam Balanced Rotating Assembly Kit

Eagle
EAGB13005E030
In stock
Rotating Assemblies
$1,660.99
Features & Benefits Balanced Cast-Steel Crankshaft – ready for installation with optimized balance for smooth operation....
$1,660.99

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Eagle Chevrolet Small Block 5140 Steel I-Beam Balanced Rotating Assembly Kit

Features & Benefits

  • Balanced Cast-Steel Crankshaft – ready for installation with optimized balance for smooth operation.

  • Forged 5140 Steel I‑Beam Rods (5.700″) – durable strength paired with precision engineering.

  • ARP 8740 Rod Bolts (3/8″) – high-grade hardware for secure, reliable assembly.

  • Hypereutectic KB Pistons (4.030″ Bore, -7cc Flat Top) – boost compression control and heat resistance.

  • Complete Ring Set (Plasma-Moly, File-Fit) – ensures tight sealing and long life.

  • Bearings (King SI Rod & Main) – OE-style quality with performance-grade durability.

  • Includes Damper & 168‑Tooth Flexplate – everything needed for external balance and automatic transmissions.

  • Universal for Street Builds – ideal for pump gas, naturally aspirated setups under 500 hp.

  • Lightweight Kit Packaging – approximately 60 lbs, making it manageable for installation.


Specifications

Specification Details
SKU / Part Number B13005E030
Engine Compatibility Chevrolet Small Block (2‑piece seal)
Balanced Yes (External balance)
Bore 4.030 in (machined)
Stroke 3.750 in
Rod Length 5.700 in
Rod Material Forged 5140 Steel I‑Beam
Rod Bolts 3/8 in ARP 8740
Piston Type KB Hypereutectic, -7cc Flat Top
Piston Pin Full floating, .927 in
Bearing Brand King SI (Rod & Main)
Rings Plasma-Moly, file-fit
Damper Included Yes
Flexplate Included 168 Teeth, for automatic transmissions
Block Clearance Required Minor pan-rail clearancing required
Approximate Package Weight 60 lbs
Ideal Use Naturally aspirated street/strip builds

Fitment Notes

Engineers at Eagle recommend verifying block clearance, especially around pan rails, to ensure smooth installation. This kit is ideal for GM small block Chevy Chevrolet 350 engines with a two-piece rear seal configuration.


What’s Included

  • Cast-steel crankshaft (balanced)

  • 8 × Forged 5140 steel I‑beam rods (5.700″)

  • 8 × ARP 8740 rod bolts (3/8″)

  • 8 × KB hypereutectic flat-top pistons (-7cc)

  • Complete plasma-moly file-fit ring set

  • King SI rod & main bearings

  • Damper

  • 168‑tooth flexplate

REVIEWS

T K

Dropped this Eagle rotating assembly into my '72 Nova and the balance was spot on. Everything fit like a glove and came with all the parts I needed. Super impressed with the quality for the price!

Tom K.

Boise, ID

★★★★★
J M

Used this kit in a 350 street/strip build for my son's first car. Real solid value. Crank and rods looked great right out of the box, and the balance was nearly perfect. Highly recommend for budget builds!

Jake M.

Lexington, KY

★★★★★
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Effective Date: October 2024
We offer a 30-day return policy, allowing you to request a return within 30 days of receiving your item. To qualify for a return, the item must be in its original condition—unused, with tags, and in its original packaging. A receipt or proof of purchase is also required.

To initiate a return, please contact us at info@riotparts.com. Returns must be shipped to the address provided upon request. If your return is approved, we will issue a return shipping label along with detailed instructions.

Important
Returns sent without prior authorization will not be accepted.

For any return-related inquiries, please reach out to us at info@riotparts.com.

Return Shipping Address
The return shipping address will be determined based on the requestor’s location to ensure the nearest return facility is used.

Possible return locations include:
10880 Lear Blvd.
Reno, NV 89506, United States
931 W. Bardin Rd., Suite 150–200
Arlington, TX 76017, United States
3035 Campus Dr.
Hatfield, PA 19440, United States
5789 N. Graham Road, Ste 200
Whiteland, IN 46184, United States
2020 NE Aloclek Dr 4711 N Lamon Ave
#118 STE 12, Hillsboro, OR 97124, United States

Damages and Issues
We recommend inspecting your order upon receipt. If you find that an item is defective, damaged, or if you received the wrong item, please contact us immediately so we can address the issue.

Exceptions / Non-Returnable Items
Certain items cannot be returned, including:
• Electrical parts that have been installed or used
• Special order parts that were custom ordered for you
• Items that have been damaged due to improper installation or use

If you have questions or concerns about a specific item, please contact us for assistance.

Exchanges
For exchanges, the quickest option is to return the item you have. Once the return is accepted, you can make a separate purchase for the new item.

Refunds
We will notify you once we receive and inspect your return to inform you whether your refund is approved. If approved, you will be automatically refunded using your original payment method within 10 business days. Please be aware that it may take additional time for your bank or credit card company to process and post the refund.

If more than 15 business days have passed since your return was approved and you haven’t received your refund, please contact us at info@riotparts.com.

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