Yeah, I've been thinking of doing the same thing as you J Zee, but more along the lines of what raleigho did, as opposed to just a direct replacement like what you seem to be looking for. I think those stock subs are just an inch or two deep, so the stock enclosure, or resonator box, is not deep enough for most aftermarket subs, even 8-inchers, which is why he had to do some cutting. I've opened that compartment up and looked at the sub and box and amp before, but never while thinking that I would want to put an aftermarket sub in there. After blowing my stock 8-inch, I orginally went with 2 12s in a box in my cargo area with an aftermarket amp hooked up to the stock head unit, which sounded awesome, but I got tired of not having full room in the back, so I took it out and have been driving around with no bass for a while now :thumbdwn: . I just haven't had much time to take that rear panel off and observe the situation again. However, what I'm thinking about doing is removing the stock enclosure, stealing the mounting apparatus off of it along with whatever hardware exists, and attaching it to a custom box that I'll make out of MDF to fit into the area where the stock one is now. Actually, I'll probably upgrade it to a 10 inch (part of me even wants to go to a 12 and/or an aftermarket amp placed where the stock one is) but I'm not completely sure about it yet. As far as the size of the sub, it really just depends on how big of an enclosure I can fit back there, but like I said, I haven't had time to look lately. It may turn out that all I can fit back there is just another 8 inch, but if that's the case, then that's fine. I like the clean, stock look, but, like you said, those stock 8 inch subs seem to blow easily (if you like to play it loud anyway
) I know this thread's already been open for a while, but I'd like to help you out if you're still looking to upgrade. Hopefully I'll get more into this project after New Years, so if you're still wanting some options, I can tell you how it goes for me, and post some pictures too if you want.
Good luck