Will a custom sub box for the 2001 f150 extended cab work in a 1999 x-cab, the seats fold differently.
Also is there anything pre fabricated that will hold a 12" sub under the rear seat? https://www.f150online.com/galleries....cfm?gnum=3911

 

there are a bunch of sites u can look at for custom enclosures instead of trying to fit a box that i dont think will work in there.

subbox.net
proboxrocks.com


those are just to but believe me there are like five others people can tell u about and they all make boxes specifically for ur year truck.