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

These are premium spark plugs, fit great and burn like butter. They come capped to ensure clearance straight from the factory and when I checked they were all within spec. Highly recommended and will buy again.

Fixed Misfire Gas efficiency improved significantly in some cases from 12mpg to 29mpg. In combination with the coils, spark plugs and the replacement of the exhaust system, I am very happy with it. I'll keep the car for a little longer.

I don't do many miles on my truck so it will probably be a long time before I know if I'm truly happy, but for now they are Great. I checked the gaps, everything is fine. I put them on my 100,000 mile motor to hopefully get another 100,000 miles before I have to do it again.

Changed it to my 2013 Toyota rav4 and took a test drive, and the driving is smooth and the acceleration is better. Changed at 66,000 miles, recommended to be changed every 50,000 to 75,000. The dealer wanted $200 to replace it, I did it myself for 30 MTS (best tutorial on YouTube), saved money. Will be updated in the future if something goes wrong with the product. .

I installed these spark plugs on my 2005 Nissan 350Z and they worked wonders. I saw an average increase of 4 hp. on wheels and an increase of 2-6 mpg. Thanks to the pre-approval, it simplified the installation. Still long but easy. I've been using them and riding daily for about 5 weeks and I'm not getting any engine codes or seeing any lack of power. They're perfect if you're looking for a little HP boost at a great price.

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…

BUT NOT THESE PLUGS I bought 6 (Bosch 9609 double iridium spark plug, last up to 4 times longer) They are made in CHINA, not Germany. But I went to Autozone and apparently the ones they sell are also made in China. (I assume everyone these days) Everything looked the same, the packaging was blue with 'Made in China' written on the forks. EXCEPT for the gap and the tips looked different! Many different! Revain's Bosch connectors look very cheap at the tips, and the needle part is noticeably…