[ilvracn]

when i worked for gm garage, some of the new cars came with ac delco, and some with ngk from factory. i was told that they are the same manufacturer. i now have good luck with both brands. champion plugs do not work well in gm vehicles. they seem to work in dodges, but if you look up the definition of dodge in the dictionary, it says, to dodge, to avoid. good enough for me