Genuine Moog K6122 Front Upper Ball Joint (NORS)
Restore the steering precision and original ride quality of your classic GM truck or van with this premium vintage New Old Replacement Stock (NORS) Front Upper Ball Joint, manufactured in the USA by Moog. This heavy-duty, bolt-on style component is essential for maintaining correct suspension geometry on a wide range of Chevrolet and GMC vehicles from 1971 to 1996, including the iconic "Square Body" C20 and C30 pickups, G-series vans, and P-series step vans. Featuring Moog’s legendary "Problem Solver" technology, this ball joint incorporates a metal-to-metal gusher bearing design that allows grease to flow freely through the bearing surface for reduced friction and extended fatigue life. Engineered during an era of robust American metallurgy, this genuine vintage part provides superior structural integrity and precise tolerances that far exceed modern generic replacements, making it a critical find for any high-quality restoration of these hardworking American classics.
Key Features:
- Brand: Moog
- Part Number: K6122
- Interchange: GM 3997408, 9751955, 9762020; TRW 10261, JBJ7038; Sealed Power 801-10261
- Position: Front Upper
- Engine: All Engines
- Origin: USA
- Condition: NORS (New Old Replacement Stock)
Technical Specifications:
| Mounting Type | Bolt-On (4-Hole) |
| Bearing Design | Metal-to-Metal Gusher Bearing |
| Greaseable | Yes |
| Included Hardware | Mounting Hardware, Castle Nut, Cotter Pin |
Verified Vehicle Fitment:
| Make | Model | Year | Engine | Notes |
|---|
| Chevrolet | C20 / C30 Pickup & Suburban | 1971-1986 | All | 2WD Front Upper |
| Chevrolet | G30 Van | 1973-1996 | All | Front Upper |
| GMC | C2500 / C3500 Pickup & Suburban | 1971-1986 | All | 2WD Front Upper |
| Chevrolet / GMC | P20 / P30 Step Van / Chassis | 1971-1999 | All | Front Upper |
Fits Years:
1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996
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.
