speed daddy headers im probably getting. the 3" after the rear. so i dont need a down pipe or anything? what do i do if i wanna keep my cat? and does the piping delete the ubend too or is that something i have to do separate. if anyone could help out thanks.

1997-2003 GRAND PRIX GTP SUPERCHARGER SPORT HEADER 6pcs: eBay Motors (item 190387106272 end time Aug-04-10 17:41:41 PDT)