Engines and Components› Engines, Blocks and Components

Eagle Specialty Products

461ci Rotating Assembly 4.250" Stroke 4.155" Bore 6.800" H-Beam Rods

$3,213.97

SKU: EAG515004155

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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 rotating assembly is a performance engine component kit. It features a forged crankshaft, forged pistons, and H-beam connecting rods with a 6.800-inch length. This assembly has a 4.250-inch stroke and a 4.155-inch bore, designed for Pontiac V8 engines, creating a 461 cubic inch displacement.

Assembly requires balancing by a qualified machine shop before use. It is not compatible with 1976 Pontiac 400 blocks due to factory notches.
Show original supplier description
The Eagle Specialty Products 515004155 rotating assembly is engineered for high-performance Pontiac V8 engines, delivering a robust 461 cubic inches of displacement. This kit includes a premium forged crankshaft and forged pistons, paired with durable 6.800-inch H-beam connecting rods, ensuring reliability under demanding conditions. The specifications include a 4.250-inch stroke and a 4.155-inch bore. Eagle Specialty Products is recognized for its commitment to quality, utilizing state-of-the-art equipment and skilled craftsmen. This rotating assembly is built to meet the standards of serious performance applications, reflecting the company's status as a leading aftermarket connecting rod manufacturer. Crucially, this assembly must be professionally balanced by a qualified machine shop prior to installation and use. Furthermore, it is explicitly not compatible with 1976 Pontiac 400 blocks due to specific factory notches located at the top of the cylinders.

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 Specialty Products
Part NumberEAG515004155
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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