id say you could probably get the upper charge pipe for roughly 100-120bucks made of mild steel. and probably over 200 for stainless. 2.5" 90 degree mandrel stainless bends run about 25bucks a piece and youll need at least 4-5 of them plus the rest of the piping plus labor, mild steal bends and piping are about half that, just to give u a rough idea.