The drop in K&N is good if you don't want to pay for a whole CAI! To get off the resonator, you must jack up the right front side of the car and take the wheel off (for better access), then you take off the inner fender lining and the right side of the engine splash shield, also you must take out the turn signal lenses on the right side to gain access to one of the bolts. Once that is all done, just unbolt the resonator and take it out. Put it all back together in reverse order and you are set!