I have an opportunity to replace the 4 stock speakers in my F250 SuperCab. I want to use Alpine and need to know the size that replaces stock speakers and mount in same bolt pattern speaker mounts. Anyone know the sizes of the front and back speakers?

 

5x7's did mine in December

 

you can use 6x8s too, thats what i put in my old 2003 and thats whats going in this 2003

 

That's precisely why these threads are so useful. Based on the size info in this thread, I ordered four Kenwood speakers off of ebay for my '99 Superduty extended cab. I found instructions on removing the door panels on youtube and they sound great!