The Story
This SKF upper steering box seal is a direct-fit replacement for the Porsche applications listed in the fitment table below. SKF has been engineering bearings, seals, and wheel-end components since 1907 and remains one of the world’s leading OEM suppliers. Built to OE-style dimensions, it’s the right way to keep the original hardware running smoothly and quietly.
Technical Details
- Manufacturer part number: 6431
- OE reference: 90011300350
- Position: Upper (steering box seal)
- Seal size: 16 x 28 x 7 mm
- Late ’57 (T2) ZF steering box applications commonly note this as the upper seal—confirm on disassembly.
Fitment & Compatibility
Use the fitment table below to confirm year and model. If you’re unsure about fitment, send us your VIN (or gearbox number where applicable) and we’ll help you verify the correct part.
We’ve been doing Porsche brake and chassis work for over 20 years, and we treat fitment questions like they matter—because they do.
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 1957 | Porsche | 356A | ||
| 1958 | Porsche | 356A | ||
| 1959 | Porsche | 356A | ||
| 1960 | Porsche | 356B | ||
| 1961 | Porsche | 356B | ||
| 1962 | Porsche | 356B | ||
| 1963 | Porsche | 356B | ||
| 1964 | Porsche | 356C | ||
| 1965 | Porsche | 356C | ||
| 1964 | Porsche | 356SC | ||
| 1965 | Porsche | 356SC |
Description
This SKF upper steering box seal is a direct-fit replacement for the Porsche applications listed in the fitment table below. SKF has been engineering bearings, seals, and wheel-end components since 1907 and remains one of the world’s leading OEM suppliers. Built to OE-style dimensions, it’s the right way to keep the original hardware running smoothly and quietly.
Technical Details
- Manufacturer part number: 6431
- OE reference: 90011300350
- Position: Upper (steering box seal)
- Seal size: 16 x 28 x 7 mm
- Late ’57 (T2) ZF steering box applications commonly note this as the upper seal—confirm on disassembly.
Fitment & Compatibility
Use the fitment table below to confirm year and model. If you’re unsure about fitment, send us your VIN (or gearbox number where applicable) and we’ll help you verify the correct part.
We’ve been doing Porsche brake and chassis work for over 20 years, and we treat fitment questions like they matter—because they do.
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 1957 | Porsche | 356A | ||
| 1958 | Porsche | 356A | ||
| 1959 | Porsche | 356A | ||
| 1960 | Porsche | 356B | ||
| 1961 | Porsche | 356B | ||
| 1962 | Porsche | 356B | ||
| 1963 | Porsche | 356B | ||
| 1964 | Porsche | 356C | ||
| 1965 | Porsche | 356C | ||
| 1964 | Porsche | 356SC | ||
| 1965 | Porsche | 356SC |
