An image posted to Facebook teases us, saying there will be a surprise "to pay homage to [Audi's] record-breaking past" at Pikes Peak. A link to a video "history lesson" starting with the Audi Sport Quattro S1 follows--documenting the S1 with drivers like Michele Mouton, Bobby Unser, and Walter Röhrl behind the wheel.
The teaser image depicts an RS 5 in what appears to be Audi Sport racing livery. The current official Pikes Peak competitor list shows no Audis newer than 2001 entered, so whatever it is, it will be a last-minute addition.
Stay tuned for more as the race draws nearer. Race week starts with technical inspections Tuesday, August 7, and runs through race day on Sunday, August 12.