Race Engineering stocks a wide variety of Cometic MLS head gaskets in our own warehouse, in many bores and thicknesses. As many other dealers do not stock these, they must ship from the manufacturer. So you wait for the parts to be made before shipping. That's because Cometic does not stock finished head gaskets and custom makes them as ordered. Why wait?
Cometic head gaskets are usually listed by bore, then the thickness (in inches).