hi bro, my current set up is 4 1 with flexible pipe, 2 bullet n s flow muffler, inspira 1.8 auto, that want i dun like is the vibration & sound bassy underneath the car floor is too strong, is this becoz of the bullet? the guy put the same size bullet with the piping(2'), i think supposed to be more bigger rite to reduce the pressure rite? muffler is ok, no sound

u mean the extractor izit bro wailup?