What are the stock speaker sizes?
The stock speaker size on a fox body mustang from 87-93 is: Rear 5×7/6×8 they both fit. Front doors 5.25 and the dash is 3.5 (I think). The stock speaker size on 94-98 is rear 5×7/6×8 both fitting again. Front is 5×7/6×8 in the doors and if you have a mach460 there is a 2.5 tweeter in the top of the door. The stock speaker size on 99+ is the same as 94-98, except for the new mach1000. Im not sure about this set up as I have never worked with one. If you have anything else that you feel should be added to this please pm me, if you have further questions post in the forum! A special thanks to The Engineer, Stylin Cobra, and GrandmasterK who wrote these questions and answers. Thank you and good luck!