I haven't driven the R for about a week and a half. But when I did drive her today, it felt as if there was a loss of power. The car doesn't rev as freely anymore, and it seems to be struggling a little bit. Could it be I need to change plugs? I also haven't cleaned the filter to my AEM yet so maybe a dirty air filter could be the culprit? Anyone have any ideas? TIA.

 

aren't the K&N filters good til like 50,000 miles or something. i doubt that would be a problem. i looked at mine at a little over 10,000 and it was clean

 

maybe your juss use't to your Bi-Turbo AWD s4,

 

that would be my guess, you could always pull the plugs and see what they look like, otherwise just drive it a little more often and see if it gets its old flare back

 

Yeah that could be it. I'm probably wondering where all my torque went.

 

I cleaned my K&N this past weekend (~23k miles) and it was pretty filthy. Made almost no difference though power wise - it's probably not that

I think you just lost a liter of displacement .. that's all

 

I agree...If you haven't drove it in awhile...it most likely feels slow because of the loss of tq compared to the S4 or WRX. I used to have a turbo Probe GT and the tq was pretty compared to the ITR.

 

Yeah - drive a golf cart for a while instead.