Audi B5 RS4 question...

[JB!]

...will the wings from an RS4 Avant fit an non-RS4 saloon?

a friend is building an RS4 saloon, and wants to know if the front end will go straight on.

[option click]

Should do. Your best best is to look at some threads on www.rs246.com - several people over there have done widebody S4 saloon conversions.