so i dont think anyone is gonna know the answer to the question . that is sad hundreds of subs on we cant find out the size of one stupid 18" lol such a pitty . so did you send extremchevy the same diesign as you sent me ?.
i know man thats crazy what about this we put it in 7cubes net with 14sq" that gives us 98" of port but we make the port as big as possible tuned to 34 or 35 . im just throwing that out there . cause i have no clue at this point