Audi S4 (B5) on the Dyno Dynamics (@dynodynamics) for a custom AMR Performance (@amrperformance) ECU software upgrade (tune) 👊 #AMRperformance #AMRtuning #AMRtuned #goAMR #AMRempire #AMR #Gettuned #doneright #facts #facts100 #becauseracecar #audi