Bosch9613 Double Iridium OE Replacement Spark Plug, Up to 4X Longer Life (1 Pk) Honda; Infiniti; Lexus; Nissan: Altima Maxima Murano Pathfinder Titan 350Z; Subaru; Toyota: FJ Tundra 4Runner +More

Planning on installing them next week, my car will only run good using these. If there a issue I will update my review and how the issue would be resolved if there happen to be one, but I don’t see that happening “knock on wood” Update it was a different brand I was recommended for that car, but they definitely helped increase HP when I changed them out today

I put these in my 2007 toyota fj cruiser... immediately notice the truck runs a lot more smoother and over the weeks also noticed a small improvement in gas milage .. Overall the truck runs better than before (this was compared to toyota dealership regular spark plugs)Not related but noteworthy.... (i do not run my tank to empty not a good idea living in the country) so all milage is to a 1/8 of a tank of gas.... My FJ is a premium fuel vehicle meaning it needs to run 91+ octane or higher. since the mandatory ethanol law all the gas stations in my area have changed to 87 octane. when I was running 91+ octane i was barely getting 250 miles to a tank of gas after the mandatory ethanol law I was forced to run 87 octane with 10% ethanol which I would only get 175 miles to a tank of gas... (huge drop was not happy about that) I put in the Bosch Iridium Fine Wire Spark Plug it boosted the gas milage to around 200 miles to a tank of gas.. then changed the oil from toyota's conventional oil to mobil one synthetic motor oil and a K&N air filter. Now I get 300 miles to a tank of gas which is a better rating than my truck had in the first place. 20 mpg HWY with an 1/8 of tank of gas to go.... :)

Perfect 🎖 go for it

Order arrived on time but only 3 of 4 were the right plug. All arrived in the same package and this odd plug was 2/3rds the size so don't understand how anyone could NOT notice that this plug didn't match the others. The odd one was in an individual package, labeled differently, different size listed on it and was significantly smaller. Wound up using one of the old plugs just to get the engine running. Not worth sending back but unsure how anyone could miss this and just disappointed in QC. Been using Amazon for years and unlike them to miss something this trivial. So far, the three that were the right plug seem to be working fine. Time will tell...

Put these in a 2006 Tacoma with 72k miles. Some say the Iridiums are good to 90k, but gas mileage and performance were dipping. Put these in and they fired right up and seemed to help perfomance a bit. Tacoma's don't get the greatest gas mileage and these may have picked it up 1or 2 mpg. Will have to run a few more tankfulls to see.If you are not sure you need to replace your plugs, you can order these to have on hand when you do. Check them carefully as they were loosely packed. I suggested to Amazon to pack them in peanuts rather than those air pillows. They were fine, but I would have liked them not to bounce around.