I'm new to this website, and I have a 2003 Lexus IS300. I'm planning on buying a Mazzuri Header around May when I'm in vacation from college. However I'd like to know how was it installing? is it easy? just putting in the stuff in the exact place? or is it all customized? I'm new to my car so I still got homework to do. Is there anything I should watch out for? if so what is it? should I let a shop do it or should I do it myself? I would, although I don't want no CEL (Check Engine Light) to come on. I'd like to do the safest way possible. I live in Hartford, Connecticut; do you know any Lexus specialists around this area? What do you recomand? Thanks for reading.