Here is the link: 97-03 PONTIAC GRAND PRIX 3.8L 3-1 RACING HEADER EXHAUST on eBay.ca (item 170429109492 end time 07-Mar-10 17:19:32 EST)

You will also need; Gm exhaust manifold gaskets, 02 extension harness

The headers include the downpipe. I would leave the stock mufflers on, their fine.

All these "speed daddy" header threads should be merged with Blue's thread.