I'm going to upgrade exhaust but want to know the pros and cons on high flow cat and no cat mid pipe. they both cost about the same so thats no big deal. I'm just wondering how high flow a high flow cat is and if a catless mid pipe would make that much of a difference? And does anyone have the new no drone mbrp cat back system on the car? Is it any quietier than thier original cat back system? Thanks for your help in advance.