OverstockDirect OEM Iridium Spark Plugs (6 pack) SP580X CYFS12YT4X

My 2015 F150 3.5 ecoboost had a misfire and I knew the time was here for new plugs. These are the OEM plugs Ford recommends. I always check gaps before installing, these were all on point coming out of the box! Easy to install the 6 and boom, my truck has been running problem free ever since. OEM quality, priced right, truck performs like royalty again.

I like to use oem equipment for my vehicle when the price is within reason. These fit the bill! These are the exact fit and and newest. version for my 3.5 eco boost engine. The price is better than the local auto parts stores and the newer style of plugs no longer need anti seize for installation. Recommended torque values are on the side of each package and the plugs come pre-gapped and are not adjustable, so you just remove old ones and install new ones. They also have a plastic sleeve that protects the gap during shipment.

Ordered these for my 2016 F150 3.5 Ecoboost All the plugs gaps were a little different. I prefer .028 gap as required. I had a little hesitation when I gun the gas on my truck. Replacing the plugs fix that problem. Truck has power again. I also recommend a magnetic 5/9 socket. I put as required dielectric grease on the tip of the boots and Silicone lubricant on the rubber coil top sleeve to help future removals.

Got to replace the 6 plugs in my 2013 Ford F150 XLT and these have been holding up strong for the last 1/2 year w/o any issues. Very happy for the cost and quality.

Exact swap for a 2014 v6 EcoBoost. Be sure to check the spark plug gaps before installing.

Great OEM quality, good price and fast shipping.

Perfect fit for my Ford fusion hybrid

These spark plugs were the exact match for my 2015 F-150 EcoBoost, and they did the trick. I was dealing with a misfire in cylinder 3, and after swapping these in, the issue was completely resolved. They all arrived pre-gapped at 0.035, but I regapped them to 0.032, which is what my truck runs best on. ✅ True OEM part numbers ✅ No damage, packaging was clean ✅ Immediate improvement in throttle response ✅ Solved the misfire without needing a shop visit Perfect if you’re doing a tune-up or fixing a misfire — especially at this price for all six.

Compre estas para el 5.0 (motorcraft CYFS12Y). Pero el gap o abertura que estas traen es de .03 pulgadas. Entonces las bujias son para el ecoboost 3.5 No pude conseguir las motorcraft CYFS12Y aqui. Entonces tuve que aperturarlas un poco mas a .049" segun especificaciones para el motor 5.0, segun indica el manual.

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Best Deal Ever

2011 F150 3.5 ECO.....perfect, i'll be buying these again when i need them in 50k km

Plug and play. Truck running perfectly!