Home >> Audi >> 2021 >> S8 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> Communication >> 91 Communication >> Sound System >> Left And Right Front Bass Speaker -R21- / -R23-, Removing And Installing >> Left And Right Front Bass Speaker -R21- / -R23-, Removing And Installing, 9VS/8RF And 9VD+EP1 >> Tightening Specifications