Originally Posted by a93x
Exhaust as in downpipe or just catback?
-grimspeed 3port EBCS
Anything bigger than a VF52 and you'll probably need larger injectors and definitely a fuel pump.
Downpipes are super easy to install, but you'll need a tune ready to go for it once it's on or drive it gently to the tuner once it is on.
EDIT: 05's also had the catted uppipe. If that's still stock, might want to consider replacing it with a catless one.