I have NGK, I did have Champion and liked those also. I got the NGK and was wondering what kind of difference there was. I noticed the gap on NGK seemed to be a lot different than the other plugs. I was told after I got the plugs to stay away from NGK cause they dont work in Harleys. Has anyone heard that before also? Im just curious is all for future reference! Thanks!!!:s If you will reply could you reply to my question in the spark plug category and not on this poll? thanks!!