Originally posted by tboner:
Spend $20 at your local mom and pop muffler shop. Have them replace the studs and nuts where the catback will bolt on.
Should take them about 15 mintues to do this. Maybe a half an hour of your time total including your drive time.
This will save you a bunch of time on your back cursing those nuts when the penetrating oil fails, and you begin to round off the existing nuts.
That's what I did when I installed the Borla. Best $20 I spent in July 
TByou need to SHOCK the stud and the nut. Get a punch and a hammer put the punch on the stud and give it one good whack. then get a socket just big enough to fit over the stud but not engage the nut and give that one good wack. then oil it up and go have lunch when you caome back it should work. If the nut squeels add more oil.
It is an old wise mans trick and it usually works awesome. I did it to my SVT and one good SHOCK and a little AERO KROIL an hour before the job and the nuts practly came off with my fingers.
The shock helps to break up the rust that bonds between the nut and the stud.
When you reinstall cover the threads of the nut and the stud with chalk, baby powder or milk of magnesia, (per GE turbine engine maintainence manual) it will stand up to the temps, unlike anti sieze, and will help them from "rust welding" again.
