TRW 9 mm three-groove engine valve keeper for Classic Porsche models: 356C, 356SC, 911, 912, 924, 928, 930, 944, and 964 applications. This TRW engine valve keeper operates within the cylinder-head valvetrain. Matching the intake or exhaust function and the listed dimensions is necessary for proper cylinder-head service.
TRW has longstanding experience with engine-valve production, and its replacement valvetrain components are cataloged by valve function, dimensions, and engine application.
Technical Details
- Manufacturer part number: MK-9H
- Brand: TRW
- Product type: Valve keeper | Valve spring lock
- Valve stem diameter: 9 mm
- Groove design: Three-groove, non-clamping
- Installation area: Valve spring and retainer assembly
Fitment & Compatibility
Confirm valve-stem diameter, groove design, and engine application before assembly. Review every row in the fitment table below for the correct year, chassis, trim, and installation details.
For a fitment check, provide PMB Performance with the VIN, model year, and installed system information. We have more than 20 years of hands-on experience with Porsche parts.
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 1964–1965 | Porsche | 356C | ||
| 1964–1965 | Porsche | 356SC | ||
| 1965–1994 | Porsche | 911 | ||
| 1965–1969 | Porsche | 912 | ||
| 1987–1988 | Porsche | 924 | ||
| 1978–1984 | Porsche | 928 | ||
| 1978–1979 | Porsche | 930 | ||
| 1983–1986 | Porsche | 944 | ||
| 1987–1989 | Porsche | 944 | Base | |
| 1987–1989 | Porsche | 944 | Turbo | |
| 1988 | Porsche | 944 | Turbo S |