One of Ruf Automobile’s most impressive riffs on the 997-generation Porsche 911 is up for auction.

The ride in question is the first example of the Rt12 S that the German tuner introduced in 2009 as the high-power successor to the Rt12. The S variant received improved aerodynamics, a distinctive front wing and a new carbon-fiber decklid with a matching carbon rear wing. Essentially, it’s a Stuttgart classic with the cool factor turned up to 11.

This particular model, which is up for grabs on Bring a Trailer, was originally built for a Puerto Rican racing driver. A testament to the ride’s beauty, it was also used as a press vehicle by Ruf and has been featured in high a number of magazines that are included in the sale.

The body is finished in a gleaming Guards Red paint that contrasts the 19-inch alloy wheels and Michelin Pilot Sport S tires nicely. Under the hood, a twin-turbocharged 3.8-liter flat-six drives all four wheels via a six-speed manual transaxle. The mill can reportedly churn out 685 horses and 664 ft lbs of twist. Stopping power comes from carbon-ceramic brakes with yellow calipers.

The cabin, meanwhile, features bucket seats in black leather with red stitching and Alcantara inserts. The same upholstery runs across the rear seats, door panels and dash. You’ll also find…