RBS will need to know header tube dia. and what application the headers are on such as funny car, dragster, pull truck etc.
RBS carries some of the more common type of covers but it takes about a week to build them if it is something that is not on the shelf. Covers are not designed to be towed down the road on an open trailer. Customer will have to come up with some sort of straps to attach if that is what is desired. Covers are sold in pairs, are made from alum. that is tig welded together then polished to a high luster.