[Shotimes] ehaust question

[ROBERT SCHIRMER]

Thinking about replacing some of my exhaust system on a '93 ATX. I know that
they make the cat-back systems for $300-400, but why would I want to do that
whole system, when I can just have some high flow mufflers installed. Are the
exhaust pipe sizes different on the cat-back system, versus the original
stock?? Appears that the flowmasters mufflers make quite a different sound
than original stock. If I want to just increase the torque, should I use the
high flow mufflers from Walker or Dynomax instead??