from Top Speed here in Dallas. I did not buy from and do not know what is on E BAY. I'm pretty sceptical of buying things that I can't hold in my hands and inspect. (Yes I've met Gregg Dupree and held his products and Kyle's) But I would have to say mine are not "cheap" and are an incredible value comparatively speaking.
The system is all stainless except for the flanges are polished steel, the welding is top notch also. Where they do have a drawback is that the finish edge on the inside of the pipes/flanges should have been tigged also. Well guess what.... For $60 bucks I had the pipes welded wonderfully on the inside edges, ground and ported them smooth, finished the flange edges and polished the whole system.. Most of the money went to the welder. I did the other work and I believe I have an excellent system for a total of 360 bucks. So I went this direction for SS split downs and midpipes.