RS4 front bumper onto a S line

not sure on fitment, but if it does bolt straight on, i would say that there would be a big mismatch at the wheel arches due to the RS4 having big flares.

just my 2p
 
aahhh Ive just been and had a good look at the rs4 front on and compared it to a normal one, didnt realise it was that much wider. scratch that idea then, back to the drawing board for a new bumper.
 
If you want the oem look, why not get a DTM bumper. Closest you'll get to the RS look.
 
I'm considering a similar thing but S-line/ S4 onto a non S-line. Is that pretty straight forward? Bolt off bolt on jobby?

Are the rear bumpers different too? Anything else?

(Basically I'm considering getting an A4 or A6 TDi but unfortunately my budget doesn't stretch to S-line versions in either car. So I'm thinking this may be an alternative... unless it includes a lot of faffing about...??)