i think hes got a 5th gen, first u should take off all the stock intake stuff and airbox then just unscrew them plasic screws in the wheel well, turn ur wheel all the way to a side so you cold pull the plastic lining out the way (i just pulled it and set it on top the tire) and unbolted the resonator and pulled it out. the rest is pretty simple. stick the filter down there and connect it to pipe on top thru the whole. and bolt everything on...