Cold Air Intake for Audi A4 B9 (2016) 1.4L TurboHigh Flow Cold Air Intake System for Audi A4 (EA211 B9) What it Does: Replaces the restrictive factory airbox and baffling with a direct flow aluminum intake system to reduce heat soak, lower intake air temperatures (IATs), and improve throttle response on the 1. 4L TFSI engine. The Stock A4 B9 Intake Bottleneck The OEM intake system on the B9 Audi A4 1. 4T is engineered primarily for cabin acoustics and NVH (Noise, Vibration, and Harshness) reduction