I don't know about hangers since I made my own y-pipe. If memory serves me, take the driver side O2 sensor and put it on the passenger side Grott and put the passenger side with extension on the drivers side Grott. It sounds screwy but the shorter factory O2 sensor needs the extension and the longer one will fit as is with the Grotts.

 

Mine didn't come with a band clamp to mate the y-pipe to the cat-back either, if that's what you're referring to. He sent me a couple of O2 extensions (3-4 I think). When I went over my checklist with him on the phone, he said the only thing I'd need are collector bolts & a band clamp for the cat-back.

 

Thanks for the help. makes sense about the extensions. Looks like I'll need to expand the y-pipe to fit my I-pipe which is 3 1/2" as I recall.

 

Roger finally came through with the stuff. Headers have been sitting here for a week, and today the y-pipe came. No clamp for the joint in the pipe, but that's not a problem. There is one o2 sensor extension, but shouldn't there be two?? Should any other parts have been included like a hanger for example? No sense in trying to call Roger about this as he doesn't return calls. Thanks for any help.