AWE Tuning Audi RS3 / TT RS S-FLO Closed Carbon Fiber IntakeAWE Tuning Audi RS3 TT RS S FLO Closed Carbon Fiber Intake 4. 5" of pure carbon power. Presenting the S FLO Carbon Intake Suite for the Audi 8V RS3 and Mk3 TT RS: S FLO Closed Carbon Intake System: The S FLO Closed Carbon Intake System combines each component of the S FLO suite and adds a bespoke carbon air box. Spanning the entire width of the grille, the S FLO Closed Carbon Intake is capable of collecting all of the ram air from the front of the