Yes it is most definitely possible to fit the 19" coupe wheels/tire setup on a sedan. There will be NO appreciable raise or lower in ride height from doing so, as the tire profile is lower with those 19s. They have more or less the same overall rolling diameter. The only issue is respect to wheel offset. If you're on running on stock ride height, then they will look extremely aggressive and stick past the fender plane slightly. It's not my cup of tea, but some people do like that. If however, you have or is planning on lowering your car (and gained negative camber as the result), the same 19" coupe wheel/tire combo will look quite nicely and be just inside the fender plane.
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-Clint
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