I changed my 1st post. Challengers are concave. They curve with the door so the bottom of the handle sticks out farther. Cudas curve with the door also so the center of the handle sticks out farther. By putting a Cuda handle on a Challenger, you end up with a very noticable gap in the center of the handle opening. I think there is a picture floating around of the differences. I'll look for it.