Ugh, I know this questions has been asked a number of times, but since the search function is down, I am going to have to be the nth person to ask this question:

What size are the speakers for a NON BOSE 5th gen max? I have measured them out to be 5.25" but everyone swears that they are 6.25". I would like to change the stocks out for Infinity Kappas, but I don't want to have to make any position modifications putting the Kappas in.

 

They are 6.75's. No brand offers a 6 3/4" replacment. Just get 6.5's and use a MDF cutout to make it work.

 

In the rear doors I think they might be 5.25 but the front like HitMan said have a large opening that you will need to make a custom surround for, easily done, get whatever spearkers you want.

 

The front speakers are 6.5 and the rear speakers are 5.25

 

Crystal Components fit perfectly in the front cutouts they are oversized 6.5 I think.

 

They are 6.5 all around. Out of the several dozens that Ive done, Ive Never used anything smaller.

--Don