The SRT Viper GTS-R is an LM GTE class race car designed and built by SRT Motorsports and Riley Technologies. It includes Michelin GT tires.
The vehicle was unveiled at the 2012 New York Auto Show, and it made its racing debut at the 2012 Mid-Ohio Sports Car Challenge where two GTS-Rs, driven by Kuno Wittmer/Dominik Farnbacher (Car No. 91), and Marc Goosens/Tommy Kendall (Car No. 93) finished 10th and 12th in the GT class (23rd and 25th overall).
The SRT Viper Racing team entering 2012 ALMS included Dominik Farnbacher, Marc Goossens, Ryan Hunter-Reay, Tommy Kendall, Jonathan Bomarito, and Kuno Wittmer.