Trust me, the Stage 1+ on th
There is no issues or compromise from fitting the smaller supercharger pulley on the B8/8.5 charger, the Revo kit comes with a new belt, we do it right and the Stage 1+ had over 2 years of development before we brought it to market a good few years back now, so now a very much proven upgrade.
We have owned 4 3.0TFSi Stage 1+ development cars at HQ, all having had a lot of track and road R&D, then global testing in varying climates and on varying fuel qualities. Revo stage 1+ is one of the most popular upgrades we offer globally through over 400 Revo dealers, not only in S4/S5, but other Audi models too.
As for the later CREC engine and our B9 S4 development car, these are in development process and no further details are shared prior to release.