BDFHYKSet of 8 Iridium Spark Plug Compatible with Expedition F150 F250 F350 F450, Compatible with Lincoln Mark LT Navigator,5.4L 6.8L V8 V10 Engine Replacement for SP515 SP546

Although my mechanic got a little made at me for buying these off Amazon, they still get the job done. Very slight difference in these and my old spark plugs but my car still runs. And that's all I can ask for. Great value for my money. They fit the same, they have the same great quality, and they function.

Never heard of Iridium plugs until I started to shop around on Amazon . I ordered these plugs as they are double Iridium at a reasonable price. Took a bit to install however - with the help of you tube video (highly recommend) to watch prior to installation.Several extra steps I never encountered before but nothing a DYI guy/gal cant figure out. when finished, I took it out for a spin and I could tell immediately the car was more peppy. improved acceleration - no lag off the line. would recommend these plugs to anyone wanting to improve engine performance and increase gas mileage. Service stations charge 150-200 to do this same easy job.

Was recommend and so far doing a Great Job.

Installed in my 2006 Ford F150. Vehicle was feeling sluggish so I replaced the plugs and coil packs. I was a little hesitant because they're made in China, but the truck feels better and more powerful. Hope they last.

i think they will work fine. I am changing today. However the socket i purchased on amazon did not work. would not go down over plug far enough to remove it.stan

Buen producto

I wasn't sure of quality. I was wrong I have put a few thousend miles on them. Work great very smooth really great quality. Way better than oem plugs. As a ase master these are a home run.

I do lyft, it was the first time that I decided to put this product on it, as the best economic option, but it was expensive, after 5 thousand miles, my car started to jump, jerk, it lost power, it stopped running in the middle of the road, It was accelerating, when I checked the strength of each spark plug, all 4 had to be changed, the catalyst began to show engine light, when I checked the computer, it indicated that it was losing compression, all the symptoms of old spark plugs (when they were new) did not occur. I recommend them; They damaged your vehicle for a few dollars less; lesson learned. I attach photos of the spark plugs (which I bought and they were almost new), they look like they had never been changed in a long time.