Review on Bosch Automotive 9609 OE Double Iridium ⚡️ Fine Wire Spark Plug (Single) - Improved for SEO by Sean Castator

I look forward to the long life of these plugs in my upgraded ignition system. The iridium twins must be strong enough to maintain the specified spark gap for a long time. Bosch specifications also state that these plugs have a copper core grounding electrode with an iridium insert, which also improves performance with less grounding resistance, which reduces wasted energy generating heat and more power in the event of a spark. I haven't found any other connector that compares better to this one. However, all bets are off if you receive a Chinese made Bosch connector which is significantly inferior in quality, performance and reliability to the German made Bosch connectors I received.