OverstockDirect Genuine OEM SP594 Iridium Spark Plugs (6 pack) CYFS12YRT3

Worked great for my 2001 Ford F150 ecoboost

Bought these for my 2021 f150. Direct OEM replacement! WARNING: sometimes later in 2021 (depends on your build date) ford changes the plug style a little bit and the part number is slightly different. If you look up your vin, both will come up. Only way to know is look at your build date, or pull one of your plugs. You can try taking it tot he dealer and asking them but no promises they know what’s actually going on.These are the first plugs I ever bought that come with a plastic protector to protect the gap size of each plug. Brilliant! No more gapping plugs manually. I’ll still check them. we between these and for performance plugs for a bit more, but I didn’t see the reason to upgrade for what I do. Helped my slight rough ideal a bit, but normal on ecoboosts to an extent.

Works perfectly for my 2.7 ecoboost (2018 F-150). It took my roughly 6 months pregnant self about three hours to install, start to finish.After the grave mistake of allowing a Tire Discounters to do an oil change on my truck while I got new tires, I was having lots of issues with misfiring and my truck randomly stalling, usually coming off the interstate. That’s really not fun when you have your family in the truck with you and you’re hours away from home, heading out west to Utah and California. Oh, and you’re pulling a horse trailer. Anyways, once we arrived in Utah, we had the truck looked at. The oil had been grossly overfilled (how in the world do you manage that???) so an oil change was done and things got better… mostly. But the misfires were still an issue. We stopped again because we could hardly get above 35mph without the truck shuddering and freaking out. They narrowed it down to bad spark plugs. They replaced them and sent us on our way. Now the issue was much better. However, after less than 8,000 miles, we started having misfires again. My truck had been misfiring for quite a while, and while I believed it was the spark plugs, the next shop I took it to said it likely wasn’t. Not wanting to gamble $500 off of my best guess, I just bought these and the necessary tools to do the installation myself. I bought a spark plug… thingy… (I forgot the word, sorry, baby brain) form Menards, but I found that, while it was great for taking the spark plugs OUT, it was not good at putting the new ones IN, as it wouldn’t let them go without leaving the aforementioned thingy in there. Thankfully, I had a Quinn brand set of thingies, and the right size was in there. That one worked much better for putting the spark plugs in. Once I had that issue figured out (that was the bulk of what took so long - trying to get the spark plug, and only the spark plug, in) the installation went very smoothly and quickly. I then drove my truck straight through to Oklahoma from Kentucky with a horse trailer, and then straight back to Kentucky the following day. No more misfires! I have also driven, again with a horse trailer, straight through from Kentucky to New York without a single incidence of a misfire. I think I’ve done about 10,000 miles with these, and I’ve not had a single issue!I have included a photo of these side-by-side with the spark plugs I removed. So glad I listened to the forum conversations I read and bought OEM! My truck seems much happier, and they have already outlasted the non OEM spark plugs that were installed before.

Genuine Motorcraft plugs by NGK. These came pre-gap and they have a coat of anti seize on them. Do not need to put extra anti seize on. My 2019 Expedition requires to swap spark plugs every 60k miles and I gained about 1 mpg.

Great deal and Half the price

Perfect for my 2018 F-150 with 3.5 Ecoboost.

Claimed 6 pack but only one plug showed up. Was easily returned but I had to find more and my project was put on hold until more arrived.

Factory parts are always best.