flowmaster sound

my buddy has borla xr1s on his f100...13:1 460 with a .700 roller and dominator, still sounds like an old dump truck with a hole in the muffler lol....but his 347sbf 1968 f100 with borla xr1s sounds AMAZING when he ***** it at 7600

What a coincidence, I sound amazing when I **** at 7600.