I am wondering if you can fit 2 12'' L5 solarbaric kickers under the back seet of a 1999 extra cab F-150

 

sure ya can.. ya will have to jack the seat up though.. ive seen some good "lift kits" on ebay
will still be fine for passengers in the back, too. i did mine myself, about 4 inches

 

How did you find it on ebay i searched for seat lift kits

 

The lift kits are great for raising the rear seat and LMI makes a solid one.......I raised mine 4 inches but still the box is only 1.25CF .... just big enough for a 12" ported..... under the "60" side.........

 

Fittin 2 L5's under there would be hard. They need like 1.75 or 2 cu. Ft. if I remember right. That box would have to be huge. It is possible thought. Like korte500 said, you will have to jack up the seat, jack it WAY up. good luck

 

.88 CuFt. in a sealed enclosure.