I would like a cat back system for my C320. I live near Peterborough and have been quoted £510 for a single exit Longlife exhaust at Topgear, Pboro. I can't find any reviews of their work and don't know anyone who has had one fitted there. I looked at MIJ and CKS but the net seems full of complaints about them. I'm worried about spending a bunch of pounds on shoddy welds, rippled bends and poor quality steel....