Carbon Fiber Air Box Intake for Audi and VWThermal Shielded Airflow for the EA113 1. 8T and 1. 9 TDI Engine Families Who Its For: Designed for enthusiasts driving Volkswagen Group vehicles from the late 90s and early 2000s, specifically those running the 20V 1. 8T (EA113) and the 1. 9 TDI workhorse engines. Whether you are daily driving a Golf MK4 or tuning an Audi TT, this is for the driver who knows that lower intake air temperatures (IATs) equal more consistent power. The Problem: Factory