Well, ive lowered my car, put 17s on it, wacked in a sound system and an induction kit, and done some colour coding and theres more to come and Renault havent said anything yet!!! I dont really care though, i can take all the parts off if anythng major goes wrong. If you do anything to the engine I.E. Induction Kit take it off before taking the car in to be serviced or have warranty work done. If they find anything that shouldnt be there theyll tell you to sod off!!! At the end of the day its a risk