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โก Spark your engineโs potential with Bosch Double Iridium โ performance that lasts and impresses!
Bosch 9621 OE Fine Wire Double Iridium Spark Plugs combine ultra-fine iridium firing pins and ground electrodes with 360-degree laser welding to reduce voltage needs by 24% and extend spark plug life by 4X compared to copper plugs. Pre-gapped and corrosion-resistant, these plugs ensure easy installation and optimal performance for modern GDI engines across multiple premium vehicle brands.





| ASIN | B0762GB2TM |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #13,397 in Automotive ( See Top 100 in Automotive ) #66 in Automotive Replacement Spark Plugs |
| Brand | Bosch |
| Brand Name | Bosch |
| Compatible with Vehicle Type | Car, SUV, Truck |
| Core Material | Iridium |
| Customer Reviews | 4.5 out of 5 stars 560 Reviews |
| Gap Size | 0.04 Inches |
| Global Trade Identification Number | 00028851034265 |
| Included Components | Spark Plugs |
| Item Type Name | Spark Plugs |
| Manufacturer | Bosch Automotive |
| Manufacturer Part Number | 9621 |
| Manufacturer Warranty Description | Limited |
| Model Number | 9621 |
| Thread Size | 12mm |
| Top Material Type | Iridium |
| UPC | 028851034265 |
| Unit Count | 4.0 Count |
| Vehicle Service Type | Car, SUV, Truck |
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