I actually reused the old bolts when I put in the new camshaft. But, then I started to worry, because they are stretch bolts and I broke a few cylinder head stretch bolts a long time ago. So, even though logic says that if they didn\'t break when reinstalled, they will probably be fine, I bought the new ones and installed them. Wow, that is a terrible sentence. Anyway, apparently my risk tolerance is lower than it used to be, so I went for new bolts. Not worth the risk and all of that.