I KNOW this has to have been asked before, but either I'm stupid (likely) or my search engine's not working.

I'm simply trying to find out two things:

1) What are the OEM speaker sizes for front/rear doors for a 2004 Ford F150 STX?

2) Is a 5x7 speaker the same as a 6x8 speaker?

 

1. 5X7 easy check though- pop the spreaker grill thing off.
2. no, a 5x7 is 5x7, a 6x8, well you get the point, but if your gonna upgrade, go 6x8

rock-on! get new speaks...

 

No, but they both fit your openings since they are so close.
Usually the 6x8's are a bit more power hungry as well.

 

That's fine with me, because so am I. LOL