well that right there makes the sub face level with seat and the blow through right above the seat ... any taller and it would obstruct rearview to much the opening is 6" tall to 3" and the port is 3" so it would act as a horn almost
Guess if it doesn't work too well you could always chop the top part off of it. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif