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Engines and Components› Crankshafts and Components

Eagle Specialty Products

3.850" Stroke Cast Steel Crankshaft

$485.99 $424.97 Save $61.02

SKU: EAG103513850

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In Stock
Ships by Sep 9
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$100 Minimum Order
30 Days Return
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Overview

The Eagle Specialty Products 103513850 is a cast steel crankshaft designed for performance applications. It features a 3.850-inch stroke and is built to be externally balanced with a 28 oz. imbalance. This crankshaft is compatible with both one-piece and two-piece rear main seals.

Constructed from cast steel, this crankshaft is inspected for dimension, size, and stroke accuracy. It boasts a journal finish of 6 R.A. or less and a target bob weight of +/- 2 percent for easier balancing. The main journal diameter is 3.000 inches, and the rod journal diameter is 2.310 inches.
Show original supplier description
The Eagle Specialty Products 103513850 is a dependable cast steel crankshaft engineered to be a robust upgrade from an OE crankshaft. It features a 3.850-inch stroke and a standard snout style, designed for engines requiring a 28 oz. external balance. This crankshaft is manufactured from cast steel and undergoes inspection for dimensional accuracy, size, and stroke. For enhanced efficiency and reliability, it features a journal finish of 6 R.A. or less and a precise target bob weight of +/- 2 percent, simplifying the balancing process. The main journals measure 3.000 inches in diameter, while the rod journals are 2.310 inches. It is explicitly noted as being for Ford 351W applications. The balancer bolt thread size is 5/8 in.-18. Eagle Specialty Products emphasizes the crankshaft as the heart of an engine, encouraging users to demand the best. This model is recommended for performance options tailored to specific vehicle years, makes, and engine applications.

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 NumberEAG103513850
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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