2.75 internal. It’s a crew cab. I was planning on a 1000.1 for each of the 12w7s and not sure for the w6’s. I was going to do a sealed box and for the 12W7 it said it required 1.3 cu per sub and the 10w6 needs .55 per sub. I moved my rear seat forward 3.5inches and I was going to put them behind...