Review on ICT Billet 4pc LS Cylinder Head Alignment Dowel Pin Steel - LT Gen 3, 4, 5 LSX LS1 LS3 LS2 LQ4 LQ9 LS6 L92 L99 L33 LR4 L82 L83 L84 L86 L87 LT1 L8B 551275 by Bob Novitsky

Although they look very similar to the LS cylinder head keys I suspect they are either BBC keys or they are just not machined properly since they also sit loose. The appropriate LS cylinder head pin should be pushed in slightly and be firmly seated. They were free even when I tried to open their gap. I had to look elsewhere as this cheap part wasn't worth the risk.