Engines and Components› Engines, Blocks and Components

Eagle Specialty Products

359 CID Rotating Assembly Kit with 6.000-Inch H-Beam Connecting Rods

$2,381.97

SKU: EAG12020040

In Stock
In Stock
Ships by Sep 9
Free Shipping over $200
$100 Minimum Order
30 Days Return
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Overview

The Eagle Specialty Products 12020040 is a rotating assembly kit designed for Small Block Chevy engines. This kit provides a 359 CID (Cubic Inch Displacement) with a 3.500-inch stroke and a 4.040-inch bore. It includes forged crankshaft and pistons, as well as 6.000-inch H-beam connecting rods.
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The Eagle Specialty Products 12020040 is a comprehensive rotating assembly kit engineered for Small Block Chevy engines, delivering a 359 CID displacement. This kit features a forged 4340 steel crankshaft with a 3.500-inch stroke and a 4.040-inch bore, paired with forged aluminum pistons. The assembly also includes 6.000-inch H-beam connecting rods made from forged 4340 steel, along with rod and main bearings. The pistons are flat-top with two valve reliefs and have a +5.00cc volume, and the kit comes with Plasmamoly piston rings.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandEagle Specialty Products
Part NumberEAG12020040
CategoryEngines and Components

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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