PRODUCT INFO
| Supplier Name | NGK |
| Product No | 4221 |
| Type | Spark plug |
| Params | Outer thread [mm]: 14.0 Width of gutter key: 20.8mm Spark plug: hard SAE connection Thread length [mm]: 19.5 Starter between the electrodes [mm]: 2.6 |
OEM NUMBER
| MAZDA | 0000-18-3649 |
| MAZDA | 3649 18 600 |
| MAZDA | 364918600 |
| MAZDA | 3744-18-600 |
| MAZDA | 374418600 |
| MAZDA | 8248-18-600 |
APPLICATION
| MAZDA RX-7 I (SA) | MAZDA RX-7 I (SA) 1.0 |
| MAZDA RX-7 I (SA) | MAZDA RX-7 I (SA) 1.1 |
| MAZDA RX-7 I (SA) | MAZDA RX-7 I (SA) 1.1 |