help with exhaust bolts

[Rawze]

I just use a 3/8" dewalt impact gun and impact 6-point socket and it works great. If the bolt is frozen, it will simply hammer away at it without breaking it.
https://amzn.to/2GZ2nOX

-- The problem is that sometimes they are not torqued properly when installed by someone.

If one is really tight,.. smack it with an air hammer a bit on its head before trying to loosen it. Sometimes it takes heating it with a torch first.

Some guys will use anti-sieze on the threads of the new bolts. If you do so, then only use a minimum amount. Be sure to only torque them according to the book.