Originally Posted by Budddweiser

if im reading your problem correctly, your talking about the three studs that are part of the cat that bolt up to the exhaust. if this is correct, i had the same problem putting on my cat back two days ago, all three seized and broke the heads off of every one. (even after i soaked it in PB Blaster for about thirty min. Hate to say it, but i had to drill out every broken stud and replaced with three stainless bolts with lock washers and nuts. Its time consuming, especially if you got a shitty 12v cordless drill that only lasts for about three min. You could always be lazy, and buy a new cat! lol i probably would if i had to do it over again