It seems that only the 2.0T egine can be upgraded, as in extra horses! Can anything be done with the 3.2 (new north american version)?

 

I feel your pain. The performance of my 3.2 is underwhelming.

To my knowledge, nothing is available at present, but much is promised (sort of).

If you read the various Audi boards, the arrival of engine management software is imminent from vendors such as Revo and Neuspeed. I wouldn't expect much in terms of a performance boost, since there's not much you can do to normally aspirated OBD II motors.

In my Bimmer days, I tried 2 post-OBD II software fixes from 2 different vendors (Dinan and Active Autowerke, two high-end aftermarket BMW tuners). The cars: '96 328is coupe, and a '98 E36 M3.

In both cases the results (for me) were imperceptible, although I hope that this won't be the case with the 3.2, as this motor is in serious need of additional grunt when laden with the weight penalty of Quattro.

 

Maybe a SC when one comes out