what type of y-pipe cat do you have? is it 2 or three bolt, did the bolt break or did the y-pipe itself
pictures please
if it is just the bolt for the 2 bolt y-pipe go to your local parts store and get the "Help" cat bolt kit for a crysler, the bolts are the same diameter but longer and the spring is longer and tappered, has nuts with the flanges on em. use a washer to bottem the bolt out on and the spare nuts that come with the set to lock it on there and you will be all set
also concider getting a new seal if you have a 2 bolt y-pipe as it doesn't seal as well the second time around
