heh I love straight pipes, my Z is going to be piped..ill have the pipe run from the turbo down and exit just behind the front wheel not sure which one yet where ever there is the most space just enough pipe so it doesnt dump into the engine bay...
I was also surprized how quiet it is through a turbo a friend of myne had the same setup on a fairmont and it wasnt as loud as you would expect from a v8 the turbo actualy muffled it ABIT not much but enough to be drivable
I would imagine it helps it spool up faster as there is basically no back presure..