Emission Control · Engine and Clutch
| System | Engine and Clutch |
| Subsystem | Emission Control |
| Assembly | Catalytic Converter |
| Thread | M14x1.5 |
| Years | 1978–1981 |
| Vehicles | 911SC |
| Confidence | Factory Verified |
Source: Porsche 911 Workshop Manual, Section 0.2-5/3 (Tightening Torques for Engine)