Hey there Miguel! I unfortunately do not have the measurements of the frame rail, however, if yours are rusted out, the frame rails are still available through BMW. In this way, you can replace the frame rails without having to do all the work like I did. It would probably save you a little money by just replacing them too! Hope this can give you some insight. Throw up some pics of your frame rail on the 02 thread! It would be great to see the work on your 1602!