H5 Civic-

No... We wanted to change our Audi bumpers so the cars at least looked like newer cars, but the cars are seperated on different lines...

Not to mention their are small "advantages." As you sorta mentioned about the lower lip... We two would have a lot more options with our front spoiler/airdam with the newer bumper. The newer bumpers would be considered part of the body wherease our current bumpers are not considered part of the body by the definition in the GCR. Because our bumpers are not considered part of the body we have no room for a splitter (With the new bumpers we could put on a 3" + splitter.

SPiFF-

Now as far as the initial question, if the cars are on the same line, then you can switch the entire assembly... People (in the old days) would switch the steel bumpers for the "hard to find" aluminim ones. I remember all the time people searching for the cars that had "light" bumpers...

ok was that some good rambling did it all make sence? or answer your question?

Raymond