Well I've been designing my box for my 2003 ext cab s10. I've decided to do the sub at a 45 degree angle facing the windshield and do the port the same way. The box is 6 ft^3 after all displacements and the port is 80 in^2 tuned to 30 hz so its about 32in long. The port is angles 45 degree off of the baffle board and goes straight down and makes a 90 degree turn and goes across the bottom. Does it have to be angled the same in the bottom of the box like its pictured below? Is that how you would do it?