Man you got me so wanting to have my subwoofer already. I cant imagine 5000 watts being thrown at that sub in the 4th order. Im pretty much going to take my chances with the 300 pounds on the stock rear shocks. They boast 1000 pound carrying capacity for the whole car. so im thinking 500 is the limit. Honestly at 5k i should have more port than those two 8 inch aero ports because im at like 34 ms at 3500 watts which i read 30 ms is the most you want with aero ports.