Product Description
Genuine 40003 Fuel Pump (Vintage Rebuilt)
Restore the fuel delivery system of your classic Ford with this genuine 40003 mechanical fuel pump. This is a vintage rebuilt part, manufactured in the USA. It has been professionally remanufactured using a high-quality original core to ensure period-correct appearance and reliable performance for your inline 6-cylinder engine.
This part is designed for the engine-mounted position on specific 1963-1966 Ford models. This includes the Fairlane equipped with the 170, 200, or 240 CID engines, and Econoline vans. This single-action mechanical pump is engineered to meet original factory specifications for fuel pressure and flow, maintaining the smooth operation of your classic Ford powertrain.
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: 40003 (Master 40003M)
- Interchange / Replaces OEM: GM 6440003, Carter M3912S, M4004S
- Position: Engine Mounted
- Engine Fitment: Ford 170, 200, 240 CID 6-Cylinder
- Origin: Made in USA (Vintage Stock)
- Condition: Vintage Rebuilt
Verified Vehicle Fitment:
| Make | Model | Year | Engine | Notes |
| Ford | Fairlane | 1963-1965 | 170, 200, 240 L6 | Mechanical Fuel Pump |
| Ford Truck | Econoline Van / P-100 | 1965-1966 | 170 L6 | Standard Equipment |
Fits Years:
1963 1964 1965 1966
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.
