Review on Autolite XP3922 Iridium Spark Plug by Marc Sortijas

I didn't buy them from Amazon but got them at work with a discount at an auto parts store. I put them on a 2014 Chevrolet Cruze LTC 1.4 Turbo. There are no mods in the car other than changing the k&n air filter. I've read on forums that people have had better luck with this. The spare gap is 0.028k, but my car had ridiculous lag and no power at 0.028. I opened them up to .035 and it was crazy how much better they felt. I didn't feel any difference from the stock plugs, but at 45,000 miles I felt like it was time for new ones that I knew would cope with my driving habits. For turbocharged V8s, especially LSs, I'd prefer to use copper plugs, but we'll see how they hold up in a small 4-turbo. If they don't hold up, I'll go back to ngk copper plugs for turbo applications.