Product Description
Genuine Johnson NH-840M X2 Connecting Rod Bearing Set (NORS)
Precision-engineered for the first generation of American Motors V8 power, this premium NORS (New Old Replacement Stock) Rod Bearing Set by Johnson is designed for the AMC "Gen-1" small-block V8 family. This set provides factory-correct fitment for the 250, 287, and 327 cubic inch displacements used across AMC, Nash, and Hudson models between 1956 and 1966. These bearings are vital for restoring proper crankshaft protection and maintaining reliable oil pressure in iconic muscle cars and luxury cruisers like the AMC Ambassador, Rambler Rebel, and the final series Hudson Hornets. Proudly made in the USA, these bearings are finished to a .002" (X2) undersize, making them an ideal choice for addressing minor crankshaft journal wear or achieving precision oil clearances during a professional-grade engine overhaul.
Key Features:
- Brand: Johnson
- Part Number: NH-840M
- Position: Connecting Rod Bearings
- Engine Fitment: AMC V8 (250, 287, 327 CID)
- Size: .002" Undersize (X2)
- Origin: USA
- Condition: NORS (New Old Replacement Stock)
Verified Vehicle Fitment:
| Make / Model | Engine Displacement | Year Range | Notes |
|---|---|---|---|
| American Motors (AMC) | 250 V8 | 1956-1961 | Ambassador / Rebel / Rambler |
| American Motors (AMC) | 287 V8 | 1963-1966 | Classic / Ambassador |
| American Motors (AMC) | 327 V8 | 1957-1966 | Ambassador / Marlin / Rambler |
| Hudson / Nash | 250 / 327 V8 | 1956-1957 | Hornet / Wasp / Ambassador |
Fits Years:
1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966
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.
