I just installed my warpspeed y pipe and magnaflo rear cat. I was supplied a hanger that looks as if it slips into the rubber mount and then c-clamps to the y by the rear cat. I did not install that yet because it doesn't look like the rubber supports much.

Anyway - I'm getting a really nasty vibration, sound after the rear cat. I think the B pipe is rubbing on that cross bar. I need your help...what can I do? The wierd thing is that it only makes that vibration when in drive - not in reverse or nuetural. Help..please!

correction: the muffler just after the rear cat - not the b-pipe.