That_White_Sierra

I was looking to put 2 twelves under the seat. Their sub model is called the level 3 12". Sorry bout the confusion. Heres the dimensions for under the seat as of now, the hump referring to the transmission hump in the center of the cab thats slightly elevated. I also did the math and figured that I have about 1.25 Cubic Feet of airspace on one side of the rear seat including the wood thickness of 3/4" MDF. The airspace dimension was also not utilizing the space above the hump.. In the end, I have enough room for the subs, just maybe not in a ported box with the proper sized port, which is what im trying to figure out,

Ive got a 2009 gmc sierra 1500 crew cab with a 2.5" seat lift. Im planning on running the DC audio level 3 12s and have tried to model boxes for a ported design but cant seem to wrap my head around box design. has anyone done anything similar with these subs or willing to help? If so, I can put dimensions of space available under the seat