Engines and Components› Engines, Blocks and Components

Eagle Specialty Products

3.750" Cast Crank Rotating Assembly

$1,418.97

SKU: EAGB15405L03068

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

Professional / shop required

Overview

It features a 3.750" cast crank, 5.700" I-beam rods with 3/8" ARP 8740 bolts, and hypereutectic KB claimer pistons with a -5cc flat top dish. The assembly includes plasma-moly standard gap rings, King SI rod/main bearings, a damper, and a 168-tooth flexplate.
Show original supplier description
The Eagle Specialty Products rotating assembly is a comprehensive kit for engine enthusiasts and builders. It includes a BALANCED 3.750" cast crankshaft paired with 5.700" I-beam connecting rods that are secured by 3/8" ARP 8740 bolts. The pistons are hypereutectic KB claimer -5cc flat top style with a 4.030" bore size. This assembly is equipped with plasma-moly standard gap rings, King SI rod and main bearings for reliable lubrication, and a damper to control vibrations. A 168-tooth flexplate is also included, making it a complete rotating assembly package. Eagle Specialty Products reserves the right to substitute parts due to availability, but will ensure compatibility. The product is currently listed as out of stock, with a price of $1,418.99. Based on available search results, this assembly is often referenced in the context of Small Block Chevy (SBC) engines, with one result specifically mentioning a 383 cubic inch displacement for a .030" overbore. It is noted as being well-suited for various applications, including street performance builds, competition racing, and general engine rebuilds. However, the product page explicitly states 'No Fitment Data,' indicating that specific vehicle application details are not provided by the manufacturer for this particular assembly.

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 NumberEAGB15405L03068
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