Rocker arm for hydro tappet for 2.0L TFSI EA113, EA888 of the 1st and 2nd generation and suitable for Audi TTRS and RS3 2.5L TFSI Hydro tappets and cam followers should always be replaced when installing a sports camshaft or when replacing the original camshafts to prevent engine damage and to allow the engine to rev faster. For the 2.0L TFSI or TSI 16 cam followers are required. For the 2.5L TFSI 20 cam followers are required. Manufacturer Information about the manufacturer BAR-TEK BAR-TEK Motorsport GmbH Im Rauschen Auel 3, 51491 Overath-Brombach, Germany info@bar-tek.com