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Supertech provides the racing market with superior valves and valve train components for virtually every type of racing. Whether it’s Drag Racing, Rally, Road Racing or any other type of motorsport, Supertech is sure to have the perfect performance solution for your application.
Black nitride valves are stainless steel valves, with a black treatment that hardens the valves. This is a hardening treatment that even though it is not widely used as the chrome coating, it has several benefits and is becoming very popular, mainly for European and Japanese applications.
The microhardness is higher than the stainless steel base material, keeping good ductility beneath the hard nitrided layer (microhardness is 800HV minimum).
Moreover, surface finish is smoother than with chromed stems, having less friction between stem and guide. Valve seat surface is harder with the nitrided layer, lasting longer with lead free fuels, alcohols, nitro and it can be used with any kind of seats (nodular iron seats, steel powder metal seats, hard aluminium-copper seats or beryllium copper seats).
- Brand
- Volkswagen, Audi
- Dimensions
- 42.00mm
- Series
- Black Nitride
- Engine
- 2.9L VR6, 2.8L VR6
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