I wouldn't go with any "cat-back" unless it was a true cat-back and replaced the OEM flex sections. AFAIK Thermal and AFE are the only ones that make a true cat-back system. Lethal makes the midpipes as well. I have been running Thermal with FenFab catted DPs since Oct21 and absolutely love it. Mellow at crusing speeds and screams at WOT. My wife didn't even notice a difference because it sounds almost the same as FENG (disabled now). Biggest bonus was no more shitty sounding flex pipe rattling.