Hey Mate,
Looks like I'm too late here but was going to suggest the BMC CAI
I had this on my previous S3 which gave me around 10hp and recently on the GTi which gave me 6hp and better top end.
Not a huge gain power wise but definite improvement in throttle response torque and best of all Sound
the sound of the turbo spool is amplified and on full throttle it sounds like a DTM Tourer - I Highly recommend it
Cheers
Looks like I'm too late here but was going to suggest the BMC CAI
I had this on my previous S3 which gave me around 10hp and recently on the GTi which gave me 6hp and better top end.
Not a huge gain power wise but definite improvement in throttle response torque and best of all Sound
Cheers