Engines and Components› Engines, Blocks and Components

Eagle Specialty Products

493 CID Rotating Assembly

$2,607.97

SKU: EAG21201030

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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 EAG21201030 is a competition rotating assembly designed for Chrysler SB (493) 440 Main, 6-Bolt applications. This assembly features a 10.725" deck height and includes a 4.350" bore with a 4.150" stroke, resulting in an actual cubic inch displacement of 493.
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The Eagle Specialty Products EAG21201030 is a high-strength competition rotating assembly engineered for ultimate strength and reliability in Chrysler SB (493) 440 Main, 6-Bolt applications. This comprehensive kit includes an Eagle 4340 forged steel crankshaft, Mahle forged 4032 aluminum pistons with a flat top / -8cc dome volume, and 6.760" Eagle 4340 H-beam connecting rods equipped with 7/16" ARP 8740 capscrews. The assembly also features plasma moly (file fit) rings, King Pro-Series rod bearings, and King Pro-Series main bearings. The deck height is 10.725" with a 4.350" bore and a 4.150" stroke, yielding an actual cubic inch displacement of 493. Compression ratios are listed as 11.6:1 with 72cc chambers, 10.8:1 with 80cc chambers, and 10.4:1 with 84cc chambers. Piston pins are included. This assembly is intended for internal balancing, and it does not include a flexplate or harmonic balancer. This rotating assembly is perfect for all forms of racing, including use with nitrous and forced induction, offering an affordable performance upgrade for Mopar RB-series engines.

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 NumberEAG21201030
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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