[turtlecrxsi]

How big do you want the box to be? Do you want it to take up the whole space or half of it or what? Are you trying to go for ultra bass, just some thump, or something in between? Do you want your car to be super slow from all the weight or to maintain some decent acceleration despite the added subs? These are the big points. Once you answer these questions, just fill in the blanks and bust out the measuring tape, mdf, glue, wood screws, power saw and carpetting...