Here is what i have so far for the 4 13kv.2 box. According to the12volt.com enclosure calc, it is about 6.3ft^3 with sub displacement. can somebody double check that for me. the measurements ae 53Wx14.5Hx20D and displacement is .06?sub so .24 all together. If these are correct, I need to make the other part of the box about 2.7-3ft^3 of 9ft^3 net to meet my goal, tomorrow i will measure the second part. Last question, can i have slot port on the top of the box going through the rear deck?