Just be careful which Locktite you use. They have various levels of strength and some of them are nearly permanent, especially on small screws. The blue stuff, labeled #242 Ibelieve, is a good medium strength and can generally be removed. It can be softened with heat however so it might not always work well on exhaust applications depending on how hot the muffler gets. A small dab of high temperature RTV silicone is sometimes helpful to prevent exhaust bolts from coming loose too.