Their rail is considerably wider, and the little locking knub thing is round instead of rectangular, so I seriously doubt they'd fit. I have a buddy with a Frontier I'll probably see in the next day or two, so I can check for you, just for the hell of it.
I moved a fridge, and felt like there was no way to go over the top of the fridge and tie it down as tight as i woul dlike without damaging somthing
Tighting the strap was acctually bending the rail. well i guess twisting it, so the clamp was not at 90degrees, more like 130.. and i mean you need it tight to be safe. I felt like if i made an erratic turn, they woudl snap. Which shouldnt be the case.
I did buy a second set of D clamps though, so i hope those work better, and just use teh rails for lighter things.