I think you may struggle with a mild steel system from the main suppliers - they all seem to be stainless these days.

If you must have mild steel, might be worth trying to find an exhaust specialist locally who could make up a bespoke system for you.


1972 4/4 4 seater, 1981 MGB GT
1984 Harley Davidson Electra Glide, 1990 Kawasaki ZX10