Since I got my car back together I have been running the same plugs. I got them about a year ago so I cant remember the exact number. As I go through the rpms my car almost falls on its face and it sounds not quite like a miss but a steady hesitation. Im going May 13th to get it tuned so I was wondering what plugs I should run? I will be running meth so it will see pretty high boost numbers, my guess is low 20s. It all depends on what it goes to without det.