I have a 2007 Ford F-350 Superduty and have just replaced the tow mirrors with ones that are for 2008-2012; the big box styled manual tow mirrors.
Now don't everyone run out and check your mirrors all at once!!!!
I thought they were symmetrical..... there not. As long as I have owned trucks, I never knew this... or never noticed it til now.
The driver side housing sits a little open and the passenger side is a little more angled in.
At first I thought the guys that sold me the new mirrors, were pulling my chain, until I saw a newer F-250 in a parking lot and as I was about to go by,I stopped to look at the front of this vehicle..... and sure nuf, they're the same.
Now when I have to go back to buy more parts, I'll have to confirm to them that I am an old raving lunatic....lol
The new mirrors are awesome, I like the the bigger convex mirror, as they really show whats coming up beside me.