What kind of gains can I expect from a GForce performance chip on a A4 B6? Its only $70 but it looks pretty promising. Has anyone installed this on their car?

 

If that's not an actual ECU reflash (and I highly doubt it is), it's not going to help you at all. When it comes to engine control and raising boost, don't cheap out or you may pay for it. APR, Revo, Uni, or Giac should be where you look. You'll need to gap your plugs down from stock .032" to .028" and upgrade your diverter valve as well.