When I put on the magnaflows, I was charge 185 for 2.5'' pipes with mandrel bends, to weld in x-pipe, mufflers and tips. When I put in the bassanis mufflers, which they just swapped out mufflers and tips, I was charged 80. The shops I've been to charge by weld. The more welds they have to do, the more it's going to cost. An x pipe needs 4 weld spots so it would cost the same to put on and x pipe than it would to put on 2 mufflers and tips on each. The go to charges 15-20 per weld but depending on how much work you brought him, he'll cut you a deal