I already bought 6.5 free air subs, the headunit, and the speakers and tweeters a few days ago, so I'm good there. I am going to use the 4/3channel 600watt amp I took out of my cobalt and use it in the car. So problem solved. HOWEVER, MAIN QUESTION!!! THERE ARE DEFINITELY THE TWO HOLES BEHIND THE SEATS FOR THE 6.5 SUBS TO FIT INTO EVEN THOUGH I HAVE THE BASE MODEL RIGHT???? I went feeling around today without taking the carpet off and everything felt pretty solid, so I wasn't sure. But I thought the base models still had the holes available.