Spark plug
| Model No. | Wrench Size (mm) | Part No. |
| NGK CMR4A | 16 | 168534-0 |
| NGK CMR6A | 16 | 168401-9 |
| NGK CMR6H | 16 | 168652-4 |
| NGK CMR7A-5 | 16 | 168599-2 |
| NGK BMR7A | 16 | 168662-1 |
| Model No. | Wrench Size (mm) | Part No. |
| NGK CMR4A | 16 | 168534-0 |
| NGK CMR6A | 16 | 168401-9 |
| NGK CMR6H | 16 | 168652-4 |
| NGK CMR7A-5 | 16 | 168599-2 |
| NGK BMR7A | 16 | 168662-1 |
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