Originally posted by dpa43:
You could also contact this place and purchase a 3 bolt flange from them. I believe you can order it with or without pressed in bolt studs also.
http://www.exhaustdirect.com/pages/oeflanges.htm#
yes it cost me $3.50 for the 3 bolt flange. But if you are going to make your three bolt y pipe work you will also need a flex pipe. The you will need to remove about an 8 in section from the pipe that comes out the back side of the cat that has the two bolt flange that connects to your cat back exhaust. Re-weld the two bolt flange on(after the 8 in removed) then weld the three bolt on the front of the cat.
Read here for an other questions. Headers FAQ
Here is a picture or how mine turned out.
 
98.5 Black SVT with 34k miles Build #5683 Born on 4\15\1998
WR Headers GMK CAI
Blaupunkt system fiberglass tweeter pods
L.E.D. tail lights in the works
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