Product Description
Genuine Johnson HE-580CP STD Connecting Rod Bearing Set (NORS)
Maintain the heavy-duty performance of your vintage powerplants with this premium NORS (New Old Replacement Stock) Rod Bearing Set by Johnson. Specifically engineered for the diverse Hercules JX Series 6-cylinder engine family, this set provides precision fitment for iconic displacements including the JXA, JXB, JXC, JXD, and the high-performance JXLD. These versatile engines served as the backbone for light-to-medium duty trucks, marine applications (including Chris-Craft), and extensive industrial machinery throughout the 1940s, 50s, and 60s. Proudly made in the USA, these bearings are critical for restoring proper crankshaft protection and maintaining reliable oil pressure in your classic build. Finished to Standard (STD) specifications, these bearings are designed for use with original-dimension crankshaft journals to ensure a professional-grade engine overhaul that meets historical factory performance standards.
Key Features:
- Brand: Johnson
- Part Number: HE-580CP
- Position: Connecting Rod Bearings
- Engine Fitment: Hercules JX Series 6-Cylinder (JXA thru JXLD)
- Size: Standard (STD)
- Origin: USA
- Condition: NORS (New Old Replacement Stock)
Verified Vehicle & Engine Fitment:
| Engine Model | Cylinders | Bore & Stroke | Common Applications |
|---|---|---|---|
| JXA / JXF | 6-Cylinder | 3-3/8" x 4-1/4" | Industrial / Truck |
| JXB / JXC / JXCT | 6-Cylinder | 3-5/8" x 4-1/4" | Truck / Marine / Chris-Craft |
| JXD / JXDF / JXE | 6-Cylinder | 4" x 4-1/4" | Military / Heavy Duty / Industrial |
| JXLD | 6-Cylinder | 4" x 4-1/2" | High Output / Industrial |
Fits Years:
1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968
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.
