How does the Mat Catback w/ 3in tips sound?

[UofMfooTbaLL24]

How does this cat back system sound? I'm buying this for a friend who is also thinking about the American Thunder catback but doesnt want to spend the money, becasue I can get the mac for around $285. He was also thinking about putting the prochamber on it. What do you guys think? Would the Mac 2.5 in, 3 in ss tip cat back sound pretty mean with the prochamber?

Thanks