i just installed my single MAC exhaust last week. i like the sound, it sounds a lot like the MRT turbine. BUT im already considering going dual. MAC makes a dual kit for the v6 but what about the rear hangers to keep the muffler in place? how has everyone else dealt with that? where do you buy the rubber mounts that slip on and do you have to drill holes to hang them or are the holes already on the frame? how easy is it to take off the rear bumper and put the gt bumper on (are there any problems like with the front grill?) this was long but thanks if anyone can help.