www.autoscope.net Audi RS4 with carbon build up on the valves. Autoscope removed the intake manifold and cleaned the carbon build up to allow the car to run as intended. Dyno runs were made before and after the cleaning to test the effects of the build up, and to test the results of the cleaning. An additional 27hp and 15ft-lbs is very significant!! Autoscope: Foreign Car Care. Personalized. Located in Dallas and Plano, TX Autoscope has been serving Dallas for 30 years! This was filmed on our Mustang Dyno in Dallas.