I picked up a magnapack cat back and started installing it yesterday. Its flat out kicking my ass. I found what appeared to be the easiest way to put it on was to start at the back and work forward but even thats not quite working out for me. Has anyone else installed one that can shed some light on why i'm having issues lining it up? I've got clearance issues on the driveshaft tunnel and upper arms which makes no sense at all. At this point I have the tips & axle section in and the mufflers mated up but I can't get the flow tubes positioned right to make everything work out. This is probably the 8th or so catback I've installed.