Engines and Components› Engines, Blocks and Components

Eagle

461ci Competition Rotating Assembly Kit

$2,899.95

SKU: EAG-51500-4155

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In Stock
Ships by Sep 12
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$100 Minimum Order
30 Days Return
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Description

The Butler EAG-51500-4155 is a competition rotating assembly kit engineered for enhanced engine performance. This kit is specifically designed for 400 blocks, offering a solution for engine builders looking to upgrade their powerplants. The assembly includes a Mahle ring set with a 4.155" bore, compatible with 4.160" rings. It features a new forged crankshaft with a 4.250" stroke. This combination results in a 461 cubic inch displacement, providing a significant increase in engine capacity and potential power output. The kit also includes Mahle -6cc Flat Top Pistons, contributing to the assembly's overall performance characteristics. Eagle Specialty competition rotating assemblies are known for consisting of name-brand quality components offered at an affordable price point, making them a viable option for a wide range of engine builds.

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.

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Specifications

BrandEagle
Part NumberEAG-51500-4155
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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