The only headers that add any HP are custom jobs. SMSP, Hytech, RMF.....all expensive, and all beautiful. But they are the only headers that add any power. Greddy are similar in design to the DC Sport, but don't break all the time. The DC Sport header not only breaks all the time, but I think it may actually make you lose a couple HP. $150 is not a deal for something that is just going to crack and hinder performance IMO.