Rwings, Omarrs with coating and optimizers are near $650, the Mikes Ascott pipes I'm referring to is a complete set, on sale for $250 pus optimizers. I'm told they are chrome, which I would guess will blue on the headpipe curve, unless they are doublewall which I doubt. By the way if things go as planned, I will pick up a 78 special on Saturday. Can you explain, "some modification for installation"??, for the 1/2 mile pipes?