09cobalt

I'm starting to build my new box tomorrow for my two fi sp4 18s that I'm cramming into the back of my car. I'm not sealing it off to make a wall the subs will be facing up and I'm trying to figure out what way would give me the best results for hitting lows super hard, should I have the port to the side, back, front. If anyone has experience with this some ideas would be greatly appreciated