I agree with Madtown. I highly, highly doubt he gained 20 hp, especially in a "stock motor"/swap. Maybe if he has a MUGEN sticker somewhere on his car that helped get the 20 hp. Like you guys said, Hytech is a custom header and will give you very nice hp gains. Most people who purchase a custom Hytech header are building very high performance/race motors. SMSP is also very good, and a bit more affordable. The OEM JDM and DC JDM will give you great gains and good bang for your buck. Madtown, is the OEM JDM header very heavy?? It looks like a tank.. I want it for OEM quality, but don't wanna a heavy ass header.. Thanks..