BOSCH 9605 OE Fine Wire Double Iridium Spark Plug - Single

The Bosch #9605 is a DOUBLE IRIDIUM design, which uses an Iridium coating on BOTH electrodes.Another Amazon customer recommended installing Iridium spark plugs in my V-8 engine, so I did a ton of research on the subject in order to get the best plugs for the least money -- and here's what I found out:The Bosch plug is the only DOUBLE-IRIDIUM design that's currently available -- and the only plug that has both of the Iridium-tipped electrodes laser-welded to the plug .What the illustration doesn't show is that both the center electrode and the ground electrode have iridium surfaces --, which should translate to a superior plug with even longer life than other brands of iridium spark plugs.The Bosch 9605 comes pre-gapped at 1.3 mm (.052) and does not require re-gapping for most applications. Most factory-gapped plugs are famously inaccurate, but a double-check showed the 9605s to be spot-on in every case.These plugs are marked * Made in Germany * on the box, with the proper gap and tightening torque, also. There is NO anti-seize necessary, as the plug is plated to avoid corrosion while allowing proper torque readings.Use of PermaTex Item # 22058 Dielectric Tune-Up Grease (available from Amazon) on the inside of the plug boots prevents boot damage and stops high-voltage terminal corrosion. Use a thin film of dielectric grease on battery posts and terminals to stop corrosion and loss of battery voltage to the electrical system.UPDATE: May 22, 2020 -- After 40,000 miles of use, the Iridium plugs are still providing excellent performance and fuel mileage. Engine starts instantly, idles smoothly, and runs strong.

I use these in my ford ranger V6 3.0 . They give noticeable increase in power. The engine sounds like it is solid and has more pickup when changing gears or driving at high speeds. They do the trick. Gas mileage is ok and i use non-ethanol gas since it gives me better mpg. Its a rebuilt 95 and purrs down the expressway. Im lucky to have a great mechanic who works for himself and i can depend on when things go bump in the night or day.

Very nice spark plugs price was reasonable

If you like your engine to start faster, nothing responds quicker than iridium spark plugs!

I'm a Bosch fan all the way, being in the trades i use Bosch and Milwaukee. Anyway i went to change plugs in my 5.4 F150 and wanted to go with the Bosch double Iridium. Picked up a set on Amazon and after install ran like crap. Scanner tool called out misfires in almost all cylinders. Pulled the Bosch out and picked up some Autolite double platinum(stock plugs) runs fine again. When i purchased the plugs Amazon flagged it and said they wouldnt fit my truck, so i went back to Bosch web siteto doublecheck the fit and these were the plugs Bosch said were for my truck. Turns out Amazon was right,no fit, i should of listened.

Replaced factory plugs, these seem to make my car run better. Slight gain in MPG. I would purchase again.

These are great! Very Pleased. My Harley loves them too.....

Took about 2 1/2 hours to change all 8 spark plugs on my Ford F-250. The local dealership wanted $350 to do the same thing. Don't let the online stuff about how hard it is scare you away from doing this yourself. If you have moderate mechanical skills, and the right tools, the job is NOT that hard.