I am in the middle of changing the gaskets on my SLP headers and was wondering if I need to be using loc tight. Also, the bolts that came with the headers do not use lock washers should I put some on? Because I really do not want to do this again.

 

Since Loctite is designed to be loosened with heat, using it on an exhaust part is a waste of time. Your best bet is to get locking bolts.