MX5 tubular exhaust?

[TalonMotorFabrication]

I know the cheapest and easy way to do the exhaust on an mx5 build is just to weld a 90' tube to the cast exhaust manifold and have done with it, that stands to reason but is there any interest in a 4-1 over top rail item?
I'm making a pair of exhaust manifolds for my 2.5 V6 and I'm doing a mock up in the same 40mm tube in mild steel for the TMXR chassis, would there be any interest at £175 in mild steel delivered? You could always use 800-1000'c manifold paint to protect it.

These would be made up of 10mm laser cut flanges, fully TIG welded and bent using a plumbing tube bender.