yup
customer did not want to pay for powder coating
It is often thought that *I* am making the part low quality.  However, I am trying to meet the demand of the customer.  The customer wanted the CHEAPEST solution possible, and that is what I provided.
If it was not powder coated, I would normally paint the pipes.  However, he said he would powder coat later, so I left it raw.  The day the kit was made, it also rained, so surface rust on mild steel happened near instantly.
Piping, black re-inforced couplers, clamps, IC, brackets, all as a bolt on easy install.