Well its a 3 seat s10 and the third seat in the back folds int othe side and the 2 12's are in a box that fits from one side to the other, I didnt make it so I do not know the dimensions. As for what 12's they are, street edge 100watts. I wouldn't have a problem with assembling a new box to fit the new speaker if that is required as long as it will fit behind the seats, which shouldnt be a problem. Thanks for clearing up the "myth."