Hey Papa Kicker does make free airs or atleast the last time I looked they did. I had a `92 Explorer with the Bose package which had a 6" sub in the side. I replaced it with the Kicker and loved it. If your not looking to compete in any SPL contest then keep it all stock and just replace the sub. I dont see why guys are calling Bose crap, atleast back in the day they were a decent sounding system. And the guy about .2 ohms or whatever(half ohm) Im not sure what that meant. You should be able to get any ohm you want, If I remember correctly I put a 6 ohm in. The old Kickers were really awesome, I stil have that 6 and an 8 and wish I could find a 6 to match for the wifes rear deck.