well, if you ask me, the KMS thunderstorm sounds like a 5 pot and so does the Gravity cat-back, and the Raggazon !! The ego X sounds reasonably deep and lairy but its hard to tell unless you are standing with the car.
No Mods. No rockers. Just a chunky knob, thats now been replaced by an RS knob innit.
Std as Ford intended, but with a space saver wheel and jack and nuts and wheel brace. oh.. and flaps, a man has got to have flaps.
For the miltek cat back make sure you turn the volume right up on your phone and the put the speaker next to your ear and that gives you an idea how loud that is. Resonated or valve controller is needed for built up areas. It sounds very bake bean can like!