6.5's or 5 1/4's?

 

Both will fit with no problem whatsoever.

 

Factory Bose has 5.25, factory non bose has 6.5. This is why theres so much confusion on this subject.

 

Wow, who knew.

What about 8's?

 

I take that back, it actually depends, there are some models of non-Bose which have factory components up front, and those also tend to have 5.25 in the rear. So theres a ton of confusion on the subject since there can be both in there depending on the model.

8's in the rear would be incredibly easy, the window doesnt even come close to rolling down far enough to hit it.