I have the regular Magnaflow catback system, theres almost 3000 miles on them. I went to a custom exhaust shop and they put it together, its all stainless steel 2.5" pipes with a black protective coating on the tailpipes. I have 4" double walled custom tips, kinda like SLP. I want to buy Bassani's, thats what I wanted in the 1st place but the sales guy talked me out of it. I thought about buying just the mufflers but I was worried about it not welding in right. I looking to sell in the next month or 2, just researching right now.