Mikalors are a fantastic clamp, and give a great even pressure all the way round.
sadly, in this instance, what you really want is a big bastard U-clamps to crush the bastards together!
I had to use an impact gun on the Mikalor over the axle to get it to tighten down, and mikalors do have a habbit of popping off the spot welds there they roll around the thread if you overtighten.
All in all though, I LOVE this exhaust. it's amazing.