I just put my cat-back from MagnaFlow on yesterday and love it!! The only problem I ran into was the tailpipe section, Performance Products sent me the one for the S-runner... one number off in the part number. They were very nice when I called and offered me to send it back and get a replacement system... I didn't have the time to do all that, so I fixed it myself... Its on their clearance/closeout page for $299 now, or at least it was last week.
I just took the stock bracket and did a little fabrication on it and bolted it right up, looks good to me. Works great.
Its got a nice rumble to it, nothing obnoxious, very nice when accelerating and then evens out to be a nice quiet hum at cruising speeds, even with the windows down. Very quiet in the cab.