If you put the rs4 bumper together right it looks ok, but like the others said it looks better with the stock bumper modified.

https://www.audiforums.com/m_769931/tm.htm

Check it out... If you want to keep it stock theres a bumper for ya. Good luck!

Its not about better or worse thats opinon, and everyones is different.
Modified Stock (2ks4)

OEM RS4

In my opinion 2ks4's bumper coverlooks better than the RS4's. I don't care much for the vents on the side even though they may provide function for the intercooler flow-through. They are just too busy for my taste. Did 2ks4 just cut out the separators or can you buy the inserts? It looks good; nice and clean.

I wish the b5 rs4 was in the U.S. I want it so bad!

buy the inserts it looks much better. And red you might be convincing me to do the mod and not buy the rs4 bumper haha

yeah so you have a bumper for sale send me some pics

I have this front end on my car and it looks great... http://www.lltek.com/A4_B5_RSR.htm
It doesn't have the indention for the euro plate and it's a very solid piece. It looks great on my car, which is black. I will send pics if you want.

I like our stock B5 bumper. IMO nothing looks better on our cars.