This is an ARP 2000 Head stud kit for 01-16 6.6L Duramax. LB7,LLY,LBZ,LMM. I removed it from a parts motor I bought for the block. Eight of the nuts were a little rusty from being outside the valve cover. Rust was on outside only and doesn't affect the function at all. I removed the rust, chased with a tap, and reapplied the black oxide coating. Picture shows regular nut on left, slightly pitted and the worst. There is only one of the worst. I would just put those nuts under the valve cover. Also included are sockets and high moly grease from the kit I installed.Cross posted so listing could end at any time.