Product Description
Genuine Thompson MS-301A Main Bearing Set (NOS)
This is an original, New Old Stock (NOS) Thompson Products main bearing set, engineered in the USA for the iconic Chevrolet "Stovebolt" inline-six engines. This standard-size (STD) kit provides a complete solution for high-quality engine rebuilds, covering the four main journals of the 216 cubic inch and early low-pressure 235 cubic inch engines. Manufactured during the golden era of American automotive engineering, these bearings offer the precision fit and historical authenticity required for a concourse-level restoration of 1937-1948 Chevrolet Master, Deluxe, Fleetline, and Series 3100 trucks.
Key Features:
- Brand: Thompson Products
- Part Number: MS-301A
- Components Included: MB-301 (Front), MB-302 (Front Intermediate), MB-304 (Rear Intermediate), MB-357 (Rear)
- Interchange: Clevite MS-301, Federal Mogul 1243M, Sealed Power 1045M
- Position: Crankshaft Main Bearings
- Engine Fitment: 216 CID and 235 CID (Low Pressure) Inline-6
- Origin: Made in the USA
- Condition: New Old Stock (NOS)
Fitment:
| Make | Model | Year | Engine | Notes |
|---|---|---|---|---|
| Chevrolet | Master / Deluxe / Special Deluxe | 1937-1942 | 216 / 235 I6 | Standard Size (STD) |
| Chevrolet | Stylemaster / Fleetmaster / Fleetline | 1946-1948 | 216 / 235 I6 | Standard Size (STD) |
| Chevrolet | Truck Series 3100 / 3600 / 3800 | 1937-1948 | 216 / 235 I6 | Standard Size (STD) |
Fits Years:
1937 1938 1939 1940 1941 1942 1946 1947 1948
Note on Photos: The images provided are of the actual item you will receive. Please inspect the photos carefully to confirm the condition and specific features of the part. Because these are vintage components, minor surface variations or packaging wear may be present; however, the part pictured is the exact unit being sold.
A Note on Fitment Accuracy: We manually research our fitment data using vintage manufacturer catalogs to provide you with the most accurate information possible. However, because we are human and these decades-old resources can occasionally contain errors, we cannot guarantee 100% accuracy. We strongly encourage you to perform your own due diligence and verify this part number for your specific application before purchasing. Please note that this part may also fit other vehicles or years not explicitly listed in our research.
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.
