i think this quesion is asked too much. if i/h/e is all you are going to do or you are not going to mod the hell out of you car then go ahead. and you don't need brand name. buying brand name is just to brag that you have it. when it comes to intake you can always make a homemade one or just get it custom bent. as for the exhaust, you don't really need to purchase a full catback. just buying a quality muffler and having custom mandrel bent piping can be cheaper than a namebrand system. and the header...well...it's hard to get that part custom made, so you'd have to get a bolton. many people have dc's so i'd go with them. comptech is also good. in the end don't worry about what people think. just do whatever you want with your car because it's yours. some people start out with only i/h/e and say that's all they want to do. then they get bit by the performance bug and start going all out.