Supertech Performance BMIVN-1040-12 Black Nitrided Intake Valve Set for BMW M3 S54

Supertech Performance intake valves are manufactured from one piece of forged stainless steel for superior strength and durability. This set includes 12 black nitrided intake valves specifically engineered for the BMW S54 3.2L inline-6 engine found in the E46 M3.

Technical Specifications:

• Head Diameter: 35.00mm (standard)
• Stem Diameter: 5.97mm
• Overall Length: 117.38mm
• Material: Stainless Steel 21-4N
• Groove Type: Single Groove
• Black Nitrided Finish
• Quantity: 12 valves per set

Black Nitride Treatment Benefits:

• Microhardness of 800HV minimum with good ductility beneath the hard nitrided layer
• Smoother surface finish than chromed stems with reduced friction between stem and guide
• Reduces power loss by minimizing valve-guide friction at high RPM
• Nitrided layer is adhered at microscopic level and will not flake or break during valve-to-piston contact
• Black nitride applies to the entire valve, unlike chrome coating which only covers the stem

Each valve undergoes a special heat treatment process calibrated to obtain the optimal hardness for the specific engine application. This complete set provides everything needed for a cylinder head rebuild or performance upgrade on BMW M3 S54 engines.