manifold paint..
Get some primer on them before they start rusting!!! use a 1200* grey primer....make sure they are clean. Not sure about the heat shields for the air cleaner tube...they might need to be finished in black..?? POR-15 makes a good manifold grey paint...Eastwood also sells one along with some other suppliers...I like the POR-15...you can brush it on...clean them with a scotchbrite pad after primer and do a couple of coats of the POR-15...try and get some primer and paint behind those shields so that it doesn't rust.
wilma