Dorman 521-678 Suspension Control Arm And Ball Joint Assembly
Features:
- Quality engineering – underwent industry-leading testing to ensure a smooth, stable and safe ride
- Durably designed – additional coatings offer long-lasting rust and corrosion resistance
This suspension control arm and ball joint assembly is a direct replacement for the original equipment on specific vehicle applications. An industry-leading evaluation process ensures a smooth ride, directional stability and predictable dynamics.
Attributes:
| End 1 Thread Diameter | 12 mm MM |
| 9532 | 356 MM |
| 4890 | 26 MM |
| 4887 | 421 MM |
| Thread Direction | Clockwise (Right) |
| Thread Pitch | 1.75 mm MM |
| Mounting Hardware Included | Yes |
| Adjustable | No |
| Bushing Type | Rubber |
| Bushing Length | 65 MM |
| 662 | 15.6 MM |
| Grade Type | Standard Replacement |
| Greaseable | Yes |
| End 2 Thread Size | 12 mm MM |
| Bushing Length | 65 MM |
| Bushing Colour | Black |
| Finish | Painted |
| Mounting Hole Diameter | 16.5 MM |
| Mounting Hole Quantity | 2 |
| Mounting Hole Diameter | 16.5 MM |
| Bore Diameter | 16.5 MM |
| Bore Diameter | 16.5 MM |
| Length Centre Bore To Centre Bore | 356 MM |
| Boot Colour | Black |
| Bearing Material | Polymer |
| Length | 215 MM |
| Thread Size | 12 mm MM |
| Pre-greased | Yes |
| Grease Fitting Included | Yes |
| Bushings Included | Yes |
| Dust Boot Included | Yes |
| 1260 | No |
| 2334 | Yes |
| 2386 | Casting/Forged |
| 2827 | No |
| 4241 | Yes |
| 6529 | Power |
| Attachments Included | Yes |
| Ball Joint Installed | Yes |
| Control Arm Type | Cast |
| Package Contents | 1 Control Arm |
| Package Contents | 1 Nut |
| Package Contents | 1 Grease Fitting |
| Set | No |
| Suspension Grade Type | Standard Replacement |
| Attachment Type | Machined |
| End 2 Thread Size | 1.75 mm MM |
| Ball Joint Stud Type | Threaded |
| Ball Joint Included | Yes |
| Material | Aluminum |
| Finish | Black |
| Length | 215 MM |
| Bushing Inside Diameter | 16.5 MM |
| Bushing Inside Diameter | 16.5 MM |
| Thread Size | 1.75 mm MM |
| Thread Diameter | 12 mm MM |
| End 1 Thread Pitch | 1.75 mm MM |
| Ball Joint Thread Diameter | 12 mm MM |
Vehicle Applications:
| Make | Model | Position | Years | Notes |
| Chevrolet | Silverado 2500 HD | Front Upper | 2020 to 2025 | |
| Chevrolet | Silverado 3500 HD | Front Upper | 2020 to 2025 | |
| GMC | Sierra 2500 HD | Front Upper | 2020 to 2025 | |
| GMC | Sierra 3500 HD | Front Upper | 2020 to 2025 |




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