Supertech black nitrided intake valves for Audi and Volkswagen 2.5T FSI engines are supplied as a set of ten with a 33.85mm standard head diameter. The nitrided surface treatment is specified in the listing to provide a hard finish on the intake valves, and the set is offered as direct-fit replacement valvetrain hardware for the stated 2.5T FSI applications.
Supertech Audi/VW 2.5T FSI Black Nitrided Intake Valves 33.85mm(std) Head Dia. - Set of 10