Hopefully this week while replacing my muffler I am also going to be replacing the tip that's on my truck with a new slightly different style. Ideally I need a 16-17" tip but I cannot find one. The most popular tips seem to go from 12" to 18". I would like to go with the 18" but the exhaust hanger nearest the back is in the way and is going to push the tip out about an inch farther then it needs to be. If I could slot the back end of the tip about an inch then it would slid right up around the hanger with no problem. Anyone know the best way to do this to stainless steel? What will it do if I cut/drill/grind on it? Will it cause premature rusting or any other issues around the slot? Thanks.