SRT is a manufacturer found in Asphalt Overdrive and Asphalt 8: Airborne. Which it a partner with Dodge.
SRT 2013 Dodge Challenger SRT8
Asphalt Overdrive Edit
The SRT Viper appears in Asphalt Overdrive as a turf 4 car.
The SRT Viper costs 500,000$.
It also provides 25% extra jump stunt score.