I am pretty new to this truck deal, so bear with me. I just got a new 09 F-150 and I was wondering where I could find a roll bar. I need one that doesn't interfere with a hard bed cover. Also does anybody know if adding stuff like roll bars can void the warranty?

 

nothing can void your warranty unless the part that was fitted was the cause of a issue. They also have to prove that the issue was caused by that part.

http://en.wikipedia.org/wiki/Magnuson-Moss_Warranty_Act

 

I have the same problem so I'm getting rid of the tonneau but since you have a newer truck you might look into Carr light bars that go on top of the cab. Best bet