Autolite Iridium XP Automotive Replacement Spark Plug, XP5364 (1 Pack)

2010 Ford Fusions. Works fine. Good price.

It was time to replace the leaking valve covers on my wifes 2015 Subaru Outback and I decided to change the plugs while I had them out. The car was running fine but after removing the old plugs I was glad I ordered these. The old plugs were pretty worn out and the center conductor was warn down probably making them less efficent. These plugs were an exact fit and were a lot less expensive than getting plugs from the autoparts store. The car seems to be running good and I'm expecting these to last quite a while.

Was very surprised when I received this to open it and find that instead of only 4 individual spark plugs I received 4 boxes of 4 individual spark plugs. They are very good quality and highly recommend.

Correct parts that fit and work.

Much improved performance with the new plugs.

Good value, but Amazon packaging was bad. I bought six of these and they were packed in a brown envelope. Most of the spark plugs had come out of their individual boxes from all the shifting. I had to carefully inspect each of them with a magnifying glass to make sure there were no chips or cracks in the ceramics.

It says 1 Pack. Plugs come in a Pack of 4 everywhere else in the world. Should be changed to '1 Plug '. I can't do anything with this single plug. What a waste.

These replaced my cars (08' Mazdaspeed 3) OEM plugs that were on for a good time so take this with a grain of salt;Car runs noticeably much smoother on acceleration and at high speeds. Over all just feels better, likely just the effect of having fresh new plugs on that are gaped correctly, either way great so far.Only thing to check for is the insulators on these plugs were a bit wider then the ones I had on my car and for whatever reason the spark plug socket I had even though it was a 5/8th socket couldnt fit these plugs because of the slightly larger insulators. So make sure to check your socket before you go taking everything apart like i did.

I ordered 4 spark plugs and 2 of them seem to be used and different from the other 2. Half of the plugs have black strips and the other half doesn't. The packaging was 4 individual boxes and all of them were already opened.