Ok, well I finally got the itch to mod the Z. I've got an 03 Enthusiast and plan to start off with exhaust work. I've already got the JWT Popcharger.
I was thinking of going with the Fujitsubo exhaust and TopSpeed headers. Does anyone have any suggestions as to which y-pipe or cats to go with?

I'm not sure if I plan on going F/I anytime soon, but if I was to, would this combo have to be replaced?

Any help is appreciated.

 

The headers and popcharger will have to be removed, unless you get the APS or Turbonetics ST kit and want to use those headers (given that they will fit).