Hi everyone I have a Question what do you guys think I have a 07 gt with a bbk cai and boomtubes I was wondering would it make that much of a power adder if I use a cut in and clamp xpipe from mac or should I just leave the stock H. and would it make that much of a sound difference even though I have the stock cats on the car. please if anyone could let me know I would appreciate it thanks.