Got this from a Cars.com article.
"The ST is also offered with either of two available performance packages: the ST Street Pack or the ST High-Performance Pack. Both have rather similar contents: 21-inch black wheels, more robust brakes and better tires. But the High-Performance Pack just turns up the dial a bit more, with “high-performance” versus “performance” brakes and a more aggressive tire, Michelin Latitude Sport 3 versus Pirelli Scorpion Zero."
The extra $600 isn't just for brake pads (that is Audi RS5 OEM pricing... ask me how I know
). So, in addition to the upgraded pads, the $600 gets you a summer Michelin instead of the all-season Pirelli. One more note... according to Michelin's website, the 275/45-21 is unavailable to order online. "Please visit your closest dealer to order this tire".
I am curious if that is actually the case since I've read conflicting stories on the internet. Anyone with the track pack out there to verify what Cars.com states?