Ok, I've done some searching, but I just want to clarify. From what I've read, the general consensus is that DC is a superior header to Greddy as far as HP gains. I want to get a 4-2-1 header to replace my factory A-pipe that is buzzing. I'm not concerned about HP gains, I just want the buzz gone. My question is...are ALL Greddy headers stainless? The 4-2-1 DC ceramic and Greddy 4-2-1 stainless are priced about the same. I found the Greddy for $284. Why would Greddy stainless be as cheap as a DC ceramic? Since I'm not interested in HP gains, I think the Greddy is a no-brainer since it's stainless and will last longer. Is there a catch? I just found it odd that the DC stainless were like double the ceramic, whereas the Greddy stainless was the same as DC ceramic. Thanks.