Hello guys, I have a 2003 Chevy S10 Xtreme ext. cab and need help,advice suggestion's on my build. I am doing two FI SP4 V.1 15"s on two 3500 watt amp's. I have upgraded all my electrical and sound deaneded the whole truck already. I"m not going to compete I just want a super loud daily that get's real low and loud. Also,not wanting to wall it. I have a problem with the box size,port size ,tunning,and what would sound loudest subs and port up,forward or vise versa. Any help is greatly appreciated.Also if anyone has pics of there builds on trucks like this i;d love to see them.