I have a pair of shotgun silencers I want to couple with muffler inserts. Because the shotguns slip over the headers you are left with scratches if you want to take them off. So, I am thinking of cutting the 4" collector short and having two sets of slip on collector tubes (cut at the 4" area not the 4 - 2 1/4 point) one muffled and one not. What would be the best tabs to use for this? "Connected tabs", "long bolt", or "spring" type?