yes they are curved. I'm sure it's for functionality, however it matches the lines and curves of the truck nicely.

 

Put mine on yesterday.. Like them very much.

 

Semi front view .. the outside line is kinda straight down.

 

Yesterday while getting gas after a car wash I was admiringly my truck and mud flaps and then I noticed a bunch of tiny pebbles between the mud flap and the truck. It made me sick. This weekend I'm taking them off, cleaning it out, reinstalling then running a fine bead of clear silicone to fill that gap.

 

good idea, even protective tape may not help that like someone mentioned installing between flap and paint.

 

I was going to say that some double sided 3M tape might be better. I've never had great luck with silicone in a place like that. It actually holds a layer of dirt and will look like crap in short order.

 

3M tape will work. However, I cinched mine down pretty tight. Put about a 100 miles on it, and haven't noticed any debris build up yet.

 

I guess they are easy enough to take off and on to clean around?

 

I use a hose with water. LOL