Put me down for this piece of wisedom:
If the header tubes don't fit tight and STRAIGHT into the sidepipes, you will enjoy leaks, as witnessed by exhaust stains and air pressure against the hand.
What makes matters worse is that I already had everything ceramic coated, so anything I do will affect the nice finish.
They were such a ***ch to get on because of the few "cock-eyed" header tubes, that I hope never to remove them again.
However I would like to paint the car someday!
Nothing like being in a hurry toward the end...
scratch