The Supertech intake valve for VW VR6 2.8L is a black nitrided intake valve sold in a set of six with a +3mm oversize for applications requiring larger valve-to-seat clearance. It provides the same replacement purpose—restoring intake sealing and fit after porting or machining—while carrying the nitrided finish noted in the part description.
Supertech VW VR6 2.8L Black Nitrided Intake Valve - +3mm Oversize - Set of 6