hey, i just wanted to know what is the best box for my tc, i have a 15 inch L7. thanks.

 

Kicker's website and your owner's manual have the specs;
1.5 to 6.0' sealed
3.0 to 6.0' ported

What's "best" for you & your tC mainly depends on how much hatch space you're willing to give up, but you're looking at a fairly big box, regardless.