AudiD5S4

Hi I just recently got some oem rs6 turbos for my 2001 s4 b5 the thing is from my understanding they are rs6 turbos all oem but with a k04 bored cold side the inlet housing. I got them for a reasonable price I didn't know of this till my buddy was telling me that the front is a modified k04 inlet. now can any one give me some knowledge on them and if so what hp can I get out of them oh and the hot side is not modified which means I will have a hard time finding downpipes right? Thanx