I would like to do this also, but have not yet had time to look for myself at the amount of space. From pictures, I believe that I should be able to fit a pair of 6" JLs in the place of the stock subs. They appear to be roughly the same size. My plan is if they are larger, to build a slightly raised and angled (to avoid contacting the seat) mount out of fiberglass. Hopefully it can be done, but I can not find dimensions for the stock subs so I am unaware of how much space or if i need to make up space for the aftermarket subs. I guess Ill have to wait till it gets warmer and investigate myself.