GM Parts ACDelco Original Equipment 41-103 Iridium Spark Plug

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.

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.

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.

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

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