2002 WS6 TA,,, cast.
As far as headers, I am waiting for NITROUS.
Exhaust now is new, custom bent 3" aluminized pipe, 2 in / 2 out 18" Flowmaster, no CAT's, stealth fit (high and tight) tips turn down right in front of the rear bumper right and left corners, and are cut off even with the bottom of the rear bumper.