









⚡ Ignite your drive with NGK Iridium IX – where power meets precision!
The NGK CR9EIX Iridium IX Spark Plug 4-pack offers professional-grade ignition performance with a durable iridium core and precise 10mm threading. Designed as a direct OEM replacement, these genuine NGK parts ensure reliable starts, enhanced throttle response, and long-lasting durability, all crafted in the USA for superior quality.
| Brand | NGK |
| Core Material | Iridium |
| Thread Size | 10mm |
| Top Material Type | Iridium |
| Vehicle Service Type | Car |
| OEM Part Number | 7085731 |
| Manufacturer | NGK |
| Model | 4 pack NGK Iridium IX 3521 Spark Plug |
| Product Dimensions | 8.41 x 2.39 x 8.43 cm; 127.01 g |
| Item model number | 3521 |
| Manufacturer Part Number | CR9EIX |
| Position | Front, Rear |
| Manufacturer | NGK |
| Country of Origin | USA |
| Item Weight | 127 g |