Supertech Performance BMIVN-1030S-12 Black Nitrided Intake Valve BMW - Set for M50/M52/S50/S52 12 Pack

These valves are made from one piece of forged stainless steel for ultimate strength and durability, making them ideal for high-performance and racing applications.

The hardened black nitride coating is most popular in European and Japanese motors and offers significant advantages over traditional chrome coatings. The microhardness exceeds the stainless steel base material with a minimum of 800HV, while maintaining good ductility beneath the hard nitrided layer. The surface finish is smoother than chromed stems, resulting in less friction between stem and guide, and the valve seat surface is harder, lasting longer with lead-free fuels, alcohols, nitro or other explosive mixes.

Specifications:

• Head Diameter: 33.00mm (Standard)
• Stem Diameter: 5.97mm
• Length: 106.1mm
• Material: Black Nitrided Stainless Steel
• Groove Type: Single Groove
• Valve Tip Hardness: 52HRc+

Key Features:

• Special heat treatment process that obtains the right amount of hardness for each engine to ensure the ultimate valve for your performance motor
• Includes stem superfinishing as standard, which when combined with black nitride reduces surface roughness to 1/3 of chrome coated valves
• Designed specifically for each application, not finished from generic blanks
• Strict dimensional tolerances for better sealing and easier installation
• Enhanced durability through higher fatigue resistance and tensile strength

This valve set is compatible with BMW S42, M42, M50, S50 (US), M52, S52 (US), and M54 engines in 1.8L, 2.5L, 2.8L, and 3.0L configurations. Must be used with single groove valve keepers.