HEEELP!....I am trying to install my Bonez downpipe and it seems that the top left thread on my exhaust housing, where studs used to be, is stripped and I can't get a bolt in there. It won't even start to thread. Any suggestions?....Has anyone else had this problem?....Same thread was stripped on my previous twins' housing too. I need to drop this motor in ASAP!...PLEEASE HELP!....Thanks...Ben