So i own a 2000 Nissan Pathfinder and i was wondering what could I add on to it to make it quicker, louder, better looking. so Far i have put a sound sytem into it and have the thing loaded with new parts so it runs brand new. Now I am wondering what can I do to make it better. Is their turbo kits availiable for pathfinders, could I add more speakers to make the car louder etc.

Thanks