Genuine Johnson SET-86 X30 Main Bearing Set (NORS)
This is a premium NORS (New Old Replacement Stock) Main Bearing Set manufactured by Johnson. Specifically engineered for the Studebaker V8 engine family, this set provides high-precision support for the 232, 259, 289, and 304 cubic inch engines found in 1951-1964 Studebaker passenger cars and trucks. Proudly made in the USA, these components are essential for restoring proper oil pressure and crankshaft longevity in your classic Commander, President, Hawk, or Lark restoration. These bearings are finished to a .030" (X30) undersize, requiring the crankshaft journals to be ground to match for a professional-grade engine rebuild.
Key Features:
- Brand: Johnson
- Part Number: SET-86
- OEM Number: 530081 / 533439
- Interchange: 1785M
- Position: Crankshaft Main Bearings
- Engine Fitment: Studebaker V8 (232 / 259 / 289 / 304 CID)
- Size: .030" Undersize (X30)
- Origin: USA
- Condition: NORS (New Old Replacement Stock)
Verified Vehicle Fitment:
| Make |
Model |
Year |
Engine |
Notes |
| Studebaker |
Commander / Land Cruiser / Starlight |
1951-1954 |
232 V8 |
Main Bearing Set |
| Studebaker |
Commander / President / Hawk / Lark |
1955-1964 |
259 V8 |
Main Bearing Set |
| Studebaker |
President / Hawk / Lark / Avanti |
1955-1964 |
289 V8 |
Main Bearing Set |
| Studebaker |
Lark / Cruiser / Avanti |
1963-1964 |
304 V8 |
Main Bearing Set |
Fits Years:
1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964
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.
