Product Description
Genuine 40258 Fuel Pump (Vintage Rebuilt)
Restore the fuel delivery system of your classic mid-60s Cadillac 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 high-displacement V8 receives steady, reliable fuel pressure.
This specific model, 40258, is the verified fitment for 1966–1967 Cadillac applications. It is engineered specifically for the 429 cubic inch V8 engine found in the DeVille, Fleetwood, and Calais series (excluding Eldorado models). According to vintage manufacturer data, this unit serves as the primary replacement for original equipment part number 644 0258 and interchanges with Carter model M4510S. It is designed to meet the precise volume and pressure requirements of Cadillac’s premium luxury powerplant during this era.
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: 40258 (Master 40258M)
- Interchange / Replaces OEM: 644 0258, Carter M4510S
- Position: Engine Mounted
- Engine Fitment: Cadillac 429 CID V8
- Origin: Made in USA (Vintage Stock)
- Condition: Vintage Rebuilt
Verified Vehicle Fitment:
| Make | Model / Series | Year | Engine | Notes |
| Cadillac | DeVille, Fleetwood, Calais | 1966-1967 | 429 V8 | Exc. Eldorado |
Fits Years:
1966 1967
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.
