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⚡ Ignite your ride with Bosch’s double iridium spark—where power meets precision!
The Bosch 9603 Original Equipment Fine Wire Iridium Spark Plug is engineered for motorcycles, featuring a double iridium core that delivers up to 4 times longer life than standard plugs. Designed with a 14mm thread size and lightweight construction, it ensures a perfect fit and reliable ignition performance, backed by Bosch’s trusted OE technology and a 4.6-star rating from over 800 users.



















| ASIN | B00515NH4K |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #111,927 in Car & Motorbike ( See Top 100 in Car & Motorbike ) #668 in Ignitions |
| Brand | Bosch |
| Brand Name | Bosch |
| Compatible with Vehicle Type | Motorcycle |
| Core Material | Iridium |
| Country of Origin | USA |
| Customer Reviews | 4.6 out of 5 stars 832 Reviews |
| Global Trade Identification Number | 00028851010375 |
| Item Weight | 0.05 Pounds |
| Manufacturer Part Number | 9603 |
| Model | 9603_1 |
| OEM Equivalent Part Number | 9603 |
| Thread Size | 14mm |
| Top Material Type | Nickel |
| UPC | 028851010375 |
| Vehicle Service Type | Motorcycle |
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