

⚡ Ignite your drive with NGK Iridium IX – where power meets precision!
The NGK CR9EIX Iridium IX Spark Plug 4-pack delivers OEM-quality ignition performance with durable iridium tips, ensuring efficient combustion and reliable starts. Designed for vehicle-specific fitment, these lightweight plugs provide a direct replacement solution for cars and trucks, making them an essential upgrade for any engine enthusiast.
| Brand | NGK |
| Core Material | Iridium |
| Thread Size | 10mm |
| Top Material Type | Iridium |
| Vehicle Service Type | Car, Truck |
| Automotive Fit Type | Vehicle Specific Fit |
| OEM Part Number | 7085731 |
| Manufacturer | NGK |
| Model | 4 pack NGK Iridium IX 3521 Spark Plug |
| Item Weight | 4.5 ounces |
| Product Dimensions | 3.31 x 0.94 x 3.32 inches |
| Item model number | 3521 |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | CR9EIX |
| Position | Front, Rear |
Trustpilot
3 weeks ago
2 weeks ago