ACDelco Professional 41-103 (12625058) Iridium Spark Plug (Pack of 1)

Buying Iridium Spark Plugs online is often a horror show with some estimates being that 60% of them are counterfeit. I have learned this the hard way having to re-replace a set of fakes that required the intake manifold to be pulled in order to change the plugs. I was very pleased when I received these, performed all the checks and tests on them and found them to be genuine AC Delco plugs. I even examined the Iridium tip under a microscope. High quality at a very reasonable price, 5 Stars.

Works. What else can I say? Spark plugs, it is what it is.

Update- after driving for a week I developed a mis fire in #6, I had replaced the coils when I did the plugs, put an old coil on 6, still P0306, bought a new coil for 6, finally after checking the fuel pressure, I was going to check compression- when I found the #6 plug had .020 gap and didnt look like the other week old plugs, bought another delco plug locally and replaced it - car runs great now - recheck the gaps and lay all the plugs out and make sure the electrodes all look the same. My 100k and 200k miles spark plugs, they came gapped almost exactly right, it take quality to last 100k miles and they have once already

Works great

Great quality from original equipment manufacturer. I always look for AC Delco parts 1st to guarantee that I’m getting the best part for my Chevrolets. Easy to install and improved the rough start issue I was having. If I have to replace one, I go ahead and replace them all at once for the best results.

The plug was exactly what I Ordered. However, I ordered 5 and they shipped each one individually. I received 3, one was damaged and returned to sender, and another just simply never made it to me. They did refund my money but what a pain in the rear!!

Perfect fit for my 2006 Pontiac Solstice. Easy installation. Car runs great.

As described. Right fit, right price, right purchase!

Works as it should PERFECTLY!!

I bought these spark plugs for my 2006 Chevrolet Trailblazer on Jun 2022 and I kept them as spare for my car. Today I decided to replaced my spark plugs and one of these new spark plugs broken while tightening! The quality of these new spark plugs is not as supposed to be and now I have to spend hundreds to fix my car.

buenas bujias originales de GM

I've learned over fifty years of car ownership and self-maintenance that the best spark plugs to buy are the exact ones that the car was built with. Nothing else. Ignore the fancy claims as "platinum" or "Iridium" etc as they are still a compromise plug. Extra cost of the fancy ones notwithstanding.

Muy buena compra, están por debajo del precio estándar en las refaccionarías