Love what Sound In Motion done for your X5. It would have been great if they built an extra subwoofer box when they built yours. I could have hitched a ride and would have gotten one .

J.


[QUOTE=jmh]A 10" can be made fit using a stealthbox type design. For a 12" you'd have to be more "creative" as the fuse box and other parts will be in the way ....
It all depends on how "stealth" you want the box to be.