you can fit quite a bit behind the seat, I have an 07 classic (same as 06) crew. Have 3 e8v3 ported behind back seat. I did move the seat forward about 1" so they would have a little more room to breathe, but you can get close to 2 cubic ft back there without moving.
you can fit quite a bit behind the seat, I have an 07 classic (same as 06) crew. Have 3 e8v3 ported behind back seat. I did move the seat forward about 1" so they would have a little more room to breathe, but you can get close to 2 cubic ft back there without moving.