Product Description
Genuine 40451 Fuel Pump (Vintage Rebuilt)
Restore the fuel delivery system of your late-production 1966 Buick to factory-correct 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 V6 or V8 engine receives steady, reliable fuel pressure.
This specific model, 40451, is the verified fitment for 1966 Buick and Buick Special applications. It is engineered to support both the 225 cubic inch V6 and the 300/340 cubic inch V8 powerplants produced after Engine Serial Number 109. According to vintage manufacturer data, this unit serves as the primary replacement for original equipment part number 644 0451 and interchanges with Carter models M4506S, M4517S, and M4524S. It is designed to meet the precise volume and pressure requirements of Buick's mid-60s engine lineup.
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: 40451 (Master 40451M)
- Interchange / Replaces OEM: 644 0451, Carter M4506S, M4517S, M4524S
- Position: Engine Mounted
- Engine Fitment: Buick 225 V6, 300 V8, 340 V8
- Production Timing: After Engine Serial No. 109
- Origin: Made in USA (Vintage Stock)
- Condition: Vintage Rebuilt
Verified Vehicle Fitment:
| Make | Model / Series | Year | Engine | Notes |
| Buick Special | Special, Skylark | 1966 | 225 V6 | After Eng. Ser. 109 |
| Buick Special | Special, Skylark | 1966 | 300, 340 V8 | After Eng. Ser. 109 |
| Buick | LeSabre, Sport Wagon | 1966 | 340 V8 | After Eng. Ser. 109 |
Fits Year:
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.
