D&S Engine Specialists concentrated its horsepower-making division into its own entity, now known as Motor City Muscle, located within D&S Engine Specialists on Rochester Road in Clawson. Motor City Muscle specializes in vintage muscle-car powertrain enhancement. Using both contemporary technologies and old-fashioned, hot-rodding techniques, Motor City Muscle is able to make older cars perform much better than they did originally, without sacrificing the originality of the vehicle.