Supertech BMW N54 Black Nitrided Intake Valve - Set of 12 (Use w/Locks KPR-5.0 / 7S)

Supertech intake valves are made exclusively from an enhanced version of EV8 (21-4N) steel, the highest grade of steel available, providing strength to withstand various applications. They feature a magnetic friction welded wafer, are hardened to 52 HRC minimum, and are one-piece forged (non-magnetic). The valves are black nitrided for superior hardness while maintaining core ductility, and feature a back-cut angle and "Superfinish" valve stem with a surface roughness of about 1/3 of a regular valve. They also have an undercut stem. These features improve durability, reduce carbon buildup, lessen friction, and offer better flow rates and sealing.