Home >> Audi >> 2015 >> S6 >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> 4.0L - Turbocharger & Supercharger - Engine Code: CEUC >> 21 Turbocharger, Supercharger >> Charge Air System >> Turbocharger Recirculation Valve Bank 2 -N427-, REMOVING AND INSTALLING >> Tightening Specifications