I donot have an evo yet but i have MBQUART Q series 1 6.5" set and 1 5.25" set, and need to know what the evo has for front and rear so i know what i need to buy and sell , let me know, thanks!
Dean

 

Both sets are 6 3/4 size but most 6 1/2 sizes with fit with the extra ring. I just replaced mine with 3 way and seperates 6 1/2 with the rings and the worked perfect!

 

Your 6 1/2's will probably fit. You'll need to make a baffle for your 5 1/4's out of Masonite. I installed some Focals front and back last week and just ended up using fender washers to mount them. Cork works well for gasket material.

http://12.208.142.171/~mike/focal/