Don't get me wrong--I used NGK'S--Fine plug--And for sure go by your Dyno read out-- I just said in my car the AC's seem to hold a " Street" tune --no rough idle/ slight stumble longer without pulling them out to clean them up--I do have a high output ignition that use to keep the Champions going back when----Didn't mean to push one plug or another--Just something that I've observed in trying different plugs---Nothing is written in stone---Didn't intend to put starch in Moparts shorts--
