The general rule is to replace them since they can stretch and tend to not torque down as well. Having said that, I know many people who have reused them, even a couple times, and not had problems, at least short term.
Is that what the company says or just what people think. It will save me a few bucks if I can use them on my b20 from my b16.ludesrv said:ARP head stud FTW. They are reusable too.