ive got a tubular bottom mount t3 manifold. Its the first one i built so its not the prettiest thing since it is mig welded but it held up great. Its made out of sch40 mild steel and its ceramic coated with a 38mm tial flange on it. I will let it go for $250 firm. I spent $100 on ceramic coating it. It is not ac friendly. PM me if you want pics