After I took the K&N off there was NO DIFFERENCE in the DYNO pull! In fact in my other Carrera, an '02, we completely removed the stock air filter, put the air box back together and did another dyno pull, no difference. We all said, "Hummmmmm....I guess K&N's don't do much."
Let me see if I get this straight, are you saying you compared two runs; one with K&N filter and one with "no" filter and you got the same results? Just curious.