High Performance intake valve stem seals for the EA855 Evo as in the Audi RS3. D hese valve stem seals offer the following advantages: High temperature resistance Improved sliding properties Longer service life When using new valves, the guides must also be replaced! Price for 10 stem seals. Manufacturer Information about the manufacturer BAR-TEK BAR-TEK Motorsport GmbH Im Rauschen Auel 3, 51491 Overath-Brombach, Germany info@bar-tek.com