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Engines and Components› Pistons and Piston Rings

Eagle Specialty Products

489ci Rotating Assembly Kit

$3,012.99 $2,591.53 Save $421.46

SKU: EAG11012030

In Stock
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 EAG11012030 is a rotating assembly kit designed for Chev BB (489) 454 applications. This kit features a 4.280" bore and a 4.250" stroke, resulting in an actual cubic inch displacement of 489.

The assembly includes an Eagle 4340 forged steel crankshaft and Mahle forged 4032 aluminum pistons with a +18cc dome volume. It also comes with plasma moly file-fit rings and 6.385" Eagle 4340 H-beam connecting rods with ARP capscrews. This rotating assembly is intended for internal balancing.
Show original supplier description
The Eagle Specialty Products EAG11012030 is a high-strength rotating assembly kit engineered for performance and reliability in racing applications. It offers the ultimate in strength and reliability at an affordable price, suitable for various forms of racing, including nitrous and forced-induction use. This comprehensive kit features a robust Eagle 4340 forged steel crankshaft and Mahle forged 4032 aluminum pistons with a +18cc dome volume. The assembly includes plasma moly file-fit rings and 6.385" Eagle 4340 H-beam connecting rods equipped with ARP capscrews. Designed for Chev BB (489) 454 engines, it boasts a 4.280" bore and a 4.250" stroke, yielding an impressive 489 actual cubic inches. Additional components included are King Pro-Series rod bearings and King Pro-Series main bearings. The assembly is intended for internal balancing and does not include a flexplate or harmonic balancer. Eagle Competition Assemblies are categorized for Chevrolet 454 engines with a 9.8" main deck height.

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 NumberEAG11012030
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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