Product Description
Genuine Federal Mogul 4400M Main Bearing Set (NORS)
This genuine Federal Mogul 4400M Main Bearing Set is a premium New Old Replacement Stock (NORS) component, specifically engineered for the legendary Chevrolet and GMC Big Block V8 engine family (Mark IV). Manufactured in the USA, this standard-size set provides the high-load durability and precise oil clearances required for a professional rebuild of displacements including the 366, 396, 402, 427, and 454 cubic inch power plants. Designed for engines where the standard crankshaft journals and housing bores have been maintained, this set ensures proper rotational alignment and optimal oil pressure for high-performance and heavy-duty reliability. It is a direct fit for iconic Big Block passenger cars and trucks produced between 1965 and 1982, including the Corvette, Chevelle, Camaro, and C/K Series trucks.
Key Features:
- Brand: Federal Mogul
- Part Number: 4400M
- Position: Crankshaft Main Bearings
- Size: Standard
- Engine Fitment: Chevy / GMC Big Block V8 (Mark IV)
- Standard Journal Diameter: 2.7485" / 2.7495"
- Origin: Made in the USA
- Condition: NORS (New Old Replacement Stock)
Verified Vehicle Fitment:
| Make | Engine Size | Year Range | Engine Type | Notes |
|---|---|---|---|---|
| Chevrolet / GMC | 366 V8 (6.0L) | 1966-1982 | Big Block V8 | Truck & Industrial |
| Chevrolet | 396 / 402 V8 | 1965-1972 | Big Block V8 | Standard Main Journal |
| Chevrolet / GMC | 427 V8 (7.0L) | 1966-1982 | Big Block V8 | High Performance / Truck |
| Chevrolet / GMC | 454 V8 (7.4L) | 1970-1982 | Big Block V8 | Includes Corvette & Truck |
Fits Years:
1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982
Note on Stock Photos: Due to our inventory of multiple identical units for this specific part number, we utilize representative stock photos for this listing. You will receive a component that strictly meets all listed specifications and fitment requirements. Please be aware that because these are vintage parts, minor cosmetic variations—such as surface finish, color, or production markings—may exist between different manufacturing runs. These slight aesthetic differences are a result of historical production processes and do not impact the part's integrity, performance, or authenticity.
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 parts 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.
Unbeatable Prices & Expectations
While many of our vintage parts were manufactured decades ago, they remain unused and high-quality. Some original boxes may show signs of shelf-wear, such as dust, tape, or surface distress from years of storage. Rest assured, the components inside have been inspected to ensure they are complete and ready to help you finish your project without breaking the bank.
