So, I guess the pair of HX2 18 inchers I have in my 2k3 Stang won't fit either . . . I have full access to my spare tire, the stock back seat, etc. Anyone want to put some money up on this? For the record, the overall diameter of a subwoofer has NOTHING to do with how good it will sound -- kind of like saying you can't get a big block to rev fast. There a multiple determining factors on how a subwoofer can sound in a vehicle, the enclosure being the single most important one of them.