AWE Tuning Audi 4.2L S-Flo Intake | B8 S52660 13018 S FLO Intake The AWE Tuning S FLO Intake was engineered to improve the 4. 2L V8's ability to draw in cool air while creating impressive power gains. The AWE Tuning 4. 2L S5 S FLO Intake uses a high flow,4 ply Nomex, fluorosilicone lined, steel wire reinforced silicon air tube to replace the restrictive factory hose. This high flow silicone tube allows cool air to travel freely to the motor. This specifically designed hose is engineered to