have the K&N intake... we are talking the one with the heat shield right? with the red wrinkle coat.
I also ran a 2.5" hose from the lower inlet on the passenger side, into the air where the filter is.
We do this on all of our cars, to get a fresh air flow on the highway. I have logged IAT's on the audi before and saw a nice drop in temps.
The problem with the kit is, u can't use it with anyone's FMIC and such...which is why our TMIC water/air is going to use the stock plumbing points.
I agree though, K&N builds a great product...even the clamps are nice, with allen head bolts and such.