The thing I don't understand with the Corsa and Borla full systems is your cutting out the entirety of the existing piping and replacing it with the exact piping and paying $2k. I can see doing this if you have some janky small diameter pipeing with bad bends, but that ain't the case with this rig.
Seems to me like a waste of materials and money. For $100, you can do a muffler delete pipe. For $500-600 you can do a muffler replacement and they sound great.
The best mine sounded was when I cut off the muffler and that only cost me one $2 sawzall blade. VROOOM, vroooom, vrooooooooom!
Corsa and Borla should sell sawzall blades and save on the R&D and marketing.