As I'm very old, the idea of spending all that money for a different sound, just seems wrong. There is almost no advantage for power.
My 69 Cutlass, with a 502 Crate motor, had 3" from the header through 3" open mufflers, with the crossover in just the right place, and they dumped out just in front of the rear wheels, legal in Canada with a 2 door. I could set off all the car alarms on the side of the road if I got a bit jiggy.
