The Audi S4 2.7t throttle body inlet boot is known for tearing and causing boost leaks. 034 Motorsport's high quality replacement Silicone Throttle Body Intake Boot was designed from the OEM part, so its a perfect fit. 4-ply silicone construction makes it virtually indestructible for years of use in high boost applications. It has an OE fit so all covers and sensors fit as they should. Tested in high boost track applications.