Product Description
Genuine 4377 Fuel Pump (Vintage Rebuilt)
Restore the fuel delivery system of your classic AMC-era V8 to factory-original standards with this professionally rebuilt mechanical fuel pump. Proudly Made in the USA, this genuine vintage unit is a period-correct component essential for high-quality restorations. By utilizing high-quality original castings, this rebuilt pump maintains the authentic look and rugged durability that modern mass-market replacements often fail to provide, ensuring your vintage V8 receives steady, reliable fuel pressure.
This specific model, 4377, is the verified fitment for 1956-1959 Hudson, Nash, and Rambler applications equipped with the 250 and 327 cubic inch V8 engines (AMC's first generation "Own Engine" design). It is the designated pump for the Rambler Ambassador, Rebel V8, and the final generation of large-chassis Hudson and Nash V8 models. According to vintage manufacturer data, this unit serves as the primary replacement for original equipment part number 559 4377 and interchanges with Carter model M2433S. It is engineered to meet the specific operating requirements of these heavy-duty early AMC powerplants.
Note on Stock Photos: Due to our volume of identical, interchangeable inventory, we use representative stock photos for this model. The image is for reference only and may depict a specific manufacturer (e.g., 'AC'). You will receive a pump that meets all listed specifications, which may be from the manufacturer shown or a fully equivalent alternative.
A Note on Fitment Accuracy: We manually research and cross-reference our fitment data using vintage manufacturer catalogs. While we strive for 100% accuracy, these decades-old resources—and the humans reading them—can occasionally contain errors. Additionally, these pumps may fit other vehicles and years not explicitly listed in our data. To ensure a seamless restoration, we kindly ask that you perform your own due diligence and verify that this specific part number is correct for your application prior to purchase.
Key Features:
- Part Number: 4377 (Master 4377M)
- Interchange / Replaces OEM: 559 4377, Carter M2433S
- Position: Engine Mounted
- Engine Fitment: AMC/Hudson/Nash V8 (250, 327 CID)
- Origin: Made in USA (Vintage Stock)
- Condition: Vintage Rebuilt
Verified Vehicle Fitment:
| Make | Model / Series | Year | Engine | Notes |
| Hudson | V8 Models (Own Eng.) | 1956-1957 | V8 | Exc. Packard Eng. |
| Nash | Ambassador V8 (Own Eng.) | 1956-1957 | V8 | Exc. Packard Eng. |
| Rambler | Ambassador, Rebel | 1957-1959 | V8 | Standard Fitment |
Fits Years:
1956 1957 1958 1959
Unbeatable Prices & Expectations
We scour the country to find the best deals on NOS and NORS parts so we can pass the savings on to you. Our vintage inventory is acquired from old auto parts stores, warehouses, and private collections. While these parts are unused or professionally rebuilt, their packaging and surfaces may show signs of shelf wear or age due to decades of storage. Rest assured, every part is a genuine piece of automotive history, built to the standards of the era it represents.
