Didn't mean to come accross as a smartass, That was the way I took it from you. I did not ask if it would "VOID" my warranty altogether as you state, Just asked if it would "Void", or result in all claims, ENGINE RELATED to be denied. That is what I meant about being clear. Don't just jump to conclusions and make insulting remarks. Sti downpipes are factory installed on WRX's in06 So apparently Subaru thought it was abetter part also. I just thought my original question was clear enough to get my question answered, at first all I got was Didn't I read previous post, None of the previous post posed the question about non SPT O.E.M parts, Anyways my question was answered on last post thank you kean. Also how would it be illeagal, It still has cat, No Emissions testing in IN, Just asking, don't beat me