18" Q box design help

[canyonondubs 0]

alright so my question is what size and what would be the ideal tuning for a box in my truck. I mostly play a mix of rock and rap

So what would u guys suggest would sound best i have a little over 11 cu ft but dont mind doing smaller just want would be best for my music

So i guess im going for LSQ i have had no experience with 18s so any help would be apprciated