Supertech Performance MCIVN-1200S-8 Black Nitrided Intake Valve Set - Mini Cooper R56 N14B16A N14B16C

These high-performance valves feature Supertech's advanced black nitride coating that delivers superior durability and performance characteristics compared to traditional chrome-coated valves.

Black Nitride Coating Benefits:

• Enhanced microhardness exceeding 800HV (Vickers hardness), providing exceptional wear resistance while maintaining excellent ductility beneath the hardened surface layer
• Superior surface finish that reduces friction between valve stem and guide, decreasing internal engine friction and power loss at high RPM
• Harder valve seat surface that resists wear from lead-free fuels, alcohol, nitrous, and other aggressive fuel mixtures
• Microscopic-level adhesion to base material that won't flake or break even during valve-to-piston contact incidents
• Full valve coverage unlike chrome coating which only treats the stem area

Premium Construction Features:

• Manufactured from high-quality stainless steel for excellent strength and heat resistance
• Swirl polished finish for optimal surface quality
• Stem undercut design for improved valve guide clearance and oil control
• Hardened valve tips exceeding 52 HRC for extended rocker arm or cam follower life
• Compatible with all seat types including nodular iron, steel powder metal, hard aluminum-copper, and beryllium copper seats

Ideal for engine rebuilds, performance upgrades, and high-RPM applications where reduced friction and enhanced durability are critical. Each set includes eight intake valves to service one complete cylinder head. Supertech Performance leverages over 20 years of racing valve manufacturing experience to deliver precision-engineered components trusted by professional engine builders and performance enthusiasts worldwide.