Honestly y'all I don't remember what plugs I placed in there now I think of it, I was on zzps forum as well ( they blow, no one re back ) and I read a thread about what plugs to run and I think it may have been a colder plug. Advanced auto parts wires and stock coils. It makes a noise after I hit " that one particular puddle" and it sounds like my exhaust broke off right under neath my floorboards and if you give it gas it gets louder sounds like straight headers on a 6cyl lol. And if I don't touch the gas peddle it'll adventualy go away... No codes. Are thrown neither..