I looked up the REX four tube headers. They look very good. I bought a pair of Reds. This was just after Red retired, I really do hope the new owner fixed his quality problem. I bought headers with the coating, (at great expense), and with the changes I had to make to get the headers to work the coating was junk. I had to grind inside the tubes to make the air flow. If you had wanted just looks, they may have been OK. The REX headers look as good as the Christenson headers for flow, but with easy to change spark plugs for number eight.