Well, here go's

Tomorrow I am doing a nice install (all pioneer) with a TS-W3004SPL subwoofer (1000w rms, 3000w peak).

Now, so far we dont have a box

Any recommendations (has to fit in a 300zx boot!?

single 12" sub..?? check the papers that comes with ya sub, itll have the litreage recommendations for that particular sub.