These are not made for DB performance. They do very well with giving me all I need inside the cabin, but they can't be heard much outside; even with the windows down. I would recommend a single 10 or 12" in a ported box; that should give you all you will need plus some in the bump department. As far as the dash, a custom bezel can be done out of ABS and resin filler to turn the 1.5 din to a factory looking flush mount single din.