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Engines and Components› Pistons and Piston Rings

Eagle Specialty Products

GM LS1 383 CID Rotating Assembly

$2,917.99 $2,594.26 Save $323.73

SKU: EAG129123905

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 GM LS1 Rotating Assembly is a 383 CID kit designed for LS-Series engines. It features a forged crankshaft and forged pistons, with a 4.000-inch stroke and a 3.905-inch bore.

This assembly includes 6.125-inch H-beam rods and is equipped with a 24-tooth reluctor. It is not an emissions item.
Show original supplier description
The Eagle GM LS1 Rotating Assembly is a comprehensive 383 CID kit engineered for GM LS-Series engines. This kit includes a forged 4340 crankshaft and forged pistons, ensuring durability and performance. With a 4.000-inch stroke and a 3.905-inch bore, it is designed to deliver enhanced engine power and responsiveness. The assembly features robust 6.125-inch H-beam connecting rods, known for their strength and reliability under demanding conditions. It comes equipped with a 24-tooth reluctor, making it suitable for LS1 engine applications. This product is classified under Engines and Components, specifically within the Rotating Assembly subcategory. Eagle Specialty Products is recognized for manufacturing high-strength connecting rods and crankshafts for racing engines, offering full rotating assemblies. This particular assembly is ideal for all forms of racing use, including applications with nitrous and forced induction. It is important to note that this product is not an emissions item.

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 NumberEAG129123905
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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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