These are brass nuts for the manifold studs as origional. Set of 6. These can also be bought individually, or in the 1" long version. While you're there, it's not a bad time to put in one of our reusable manifold gaskets if you haven't already.

Manifold Nut - Brass 948, 1098, 1275 - set of 6

SKU: WBM-100