I have a 420a 3" Turbo Downpipe. Custom made. Its a 5 bolt flange for a 5 bolt T3 turbo. Comes with O2 bung welded in already. For pictures go here: http://www.go-dsm.com/cherbear/ ...$50.00.

If your running a cat or test pipe you can have a flanged welded on the end to bolt on or your can simply run 3" all the way back