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⚡ Ignite your drive with Bosch’s double iridium precision!
Bosch 9621 OE Fine Wire Double Iridium Spark Plug delivers advanced ignition technology with a 360° laser welded ultra-fine iridium firing pin that reduces voltage requirements by up to 24%. Designed for modern gasoline engines including GDI, it features factory pre-gapped electrodes and corrosion-resistant nickel-plated threads for easy installation and long-lasting performance.



















| ASIN | B005GN1THO |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #543,226 in Automotive ( See Top 100 in Automotive ) #2,898 in Automotive Replacement Spark Plugs |
| Brand Name | Bosch |
| Compatible with Vehicle Type | Car, Truck |
| Core Material | Iridium |
| Customer Reviews | 4.6 4.6 out of 5 stars (169) |
| Gap Size | 0.04 Inches |
| Global Trade Identification Number | 00028851034258 |
| Included Components | spark plug |
| Item Type Name | Spark Plug |
| Item Weight | 0.09 Pounds |
| Manufacturer | Bosch Automotive |
| Manufacturer Part Number | 9621 |
| Manufacturer Warranty Description | Limited |
| Model Number | 9621_1 |
| OEM Equivalent Part Number | 9621 |
| Thread Size | 12mm |
| Top Material Type | Nickel |
| UPC | 028851034258 |
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