Engines and Components› Crankshafts and Components

Eagle Specialty Products

Forged 4340 Crankshaft, 3.480" Stroke

$940.99

SKU: EAG4350348057LA

In Stock
In Stock
Ships by Sep 9
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Overview

The Eagle Specialty Products 4350348057LA is a lightweight crankshaft designed for racing engines. Constructed from forged 4340 steel, this crankshaft features a 3.480-inch stroke and internal balancing. It utilizes a two-piece rear main seal and has lightening holes in the rod throws to reduce weight, contributing to its overall weight of 48-49 lbs.
Show original supplier description
The Eagle Specialty Products 4350348057LA is a lightweight crankshaft engineered for high-performance racing applications. Crafted from durable forged 4340 steel, this crankshaft is built to withstand the demands of competitive engines. Its non-twist forging process and multi-stage heat treatment ensure strength and longevity. This crankshaft features a 3.480-inch stroke and internal balancing, making it suitable for specific engine builds. Each journal is micro-polished, and a .125-inch fillet radius is applied to enhance strength. The inclusion of lightening holes in every rod throw significantly reduces overall weight, resulting in a product that typically weighs between 48 and 49 lbs. The rear main seal is a two-piece design, and it requires narrow bearings.

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

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandEagle Specialty Products
Part NumberEAG4350348057LA
CategoryEngines and Components

We’re here — turning wrenches, just like you.

Call us, follow along, or come say hi.

(760) 282-4645 Instagram Google

Buy with Confidence

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.

View Full Return Policy

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.

View Full Shipping Policy