What is the difference between the US SR20DE and the Japanesse one. Is this the same one as the JDM (or something like that) SR20DE and the one in the primera? I know they have the SR20DET. Does anyone know the HP ratings? On something else not related, my idle on my classic is sometimes at 1200 when i first start my car. Its only there some of the time. Once I start driving it drops back to normal.