I was wondering if they sell adapter kit for our car on the rear speakers. I want to be able to take out the rear speakers without having to yank the splicing.

While on the subject, is there a way to fit a 6x9 in the rear or front????

 

Crutchfield sells an adapter harness, or it's free with a speaker purchase. A 6x9 won't fit in either location without some major cutting.