You might want to post the actual dimensions you have to work with in the trunk i.e. side to side(w) bottom to top(h) front to back(d). You'll also want to include if you're looking for a sealed box or ported. It will also help if you post the cu. ft. needed per subwoofer either in a sealed or ported enclosure. This will get the genuis forum box builders to number crunching and design layout. Goodluck, I'd like to see what they come up with myself. Bumpif some one has a box designor know where i can get one for a chrysler 2005 chrysler 300 i would greatly appciate it for 2 apline type r s in a slot ported box thanks in advance