well when you got a car full you wont be blasting it around anyway, I always feel the GT feels the same with 1 passenger, but with anyone extra in the back it really slows down. I'm going to have 2 amps, 1 for sub, 1 for fronts, no rear speakers, 1 12" sub, and a computer ;). My build will be fully MDF, as I don't know how to fiberglass and don't have the time to learn or after researching the cost, the money to do that! So its not going to look amazing, the small boot in the starlet isn't helping plus I planned for a 3-point rear strut brace which also doesnt help! So far all I've done is