My car is an original louvered car. I bought Dales louvers as mine were missing. They were a dead on bolt up. Not sure from your pic what you are looking at but mine look the same. They are about 3" from the outside of the louvers to the inside edge of the window trim and taper out at the bottom. Just went out and took a quick measurement (it's cold out) . Where the bottom corner of the window tuns to the outside edge of louvers is 4 1/2". If what Alan is refering to (?) the bottom slat on mine are rounded off to follow the turn of the vinyl top trim. Would like to see a comparison between cuda and challenger, because I'm not sure of the differences either.