Tina Tbolt takes her Audi S5 V8 4.2L to DC Performance in Los Angeles for a custom tune. DC Performance in-house Dyno center features a full-time tuner, top of the line equipment, and two in-house Dynamometers. (Dynapack 4Wheel & DynoJet 2Wheel). DC Performance custom tuning and performance shop on the web @ Welcome to DC Performance.