1997 1998 1999 2000 PONTIAC GRAND PRIX 3.8L V6 HEADERS - eBay (item 170469647635 end time Jan-31-11 16:41:03 PST)
Pacesetter Exhaust Headers Pontiac Grand Prix GTP - eBay (item 390278642780 end time Feb-06-11 15:10:46 PST)
ZZ Performance
and headers can be had for really cheap if need be