I recently changed out my HT0 plugs with a new set do to a slight miss every once and awhile. That was about 10,000 miles ago and now the miss is back again. I remember reading someone using a champion one peice plug. Do they make a one peice plug a step colder than stock yet? If so, where can I purchase from? Im sure with only 10,000 miles on mine they will come rite out but i'd rather replace them w/ a one peice to be safe.