flowmaster 60 series, its made for small engines
http://www.youtube.com/watch?v=X3UbVzEsI_Y
here is my old tacoma with a 60 series, sounds pretty good IMO
as for the "baja" look, get a pre runner style front bumper, some big ass lights, lift the rear like 3 inches, the front like 2 to give it a raked look.