Chrysler's decision to pull out of the Le Mans 24 Hours was motivated by a desire to focus on its attempt to win the United SportsCar Championship in 2014.
Bill Riley, whose Riley Technologies team has developed and runs the two SRT Viper GTS-Rs, has elaborated on a brief statement made by Street Racing Technology boss Ralph Gilles about the withdrawal earlier this week.
"Le Mans takes a lot of effort and resources, so we just decided that we are going to focus on the US series," he said.
"Right now are aim is to try to win races in North American and then go on to try to win the championship."
Riley stressed that the debate over the Balance of Performance in the GTE Pro class did not affect its decision.
"On the BoP side, we were very encouraged by our discussions with the Automobile Club de l'Ouest and the FIA [which jointly write the rule book]," he explained.
Riley said he was hopeful that SRT would decide to return to Le Mans in 2015.
The two Vipers currently lie fourth and fifth in the USC championship within eight points of the leading Rahal BMW.