Supertech black nitride intake valves for VQ37VHR 370Z, G37, Q50/Q60. These valves are available in a +1 oversize to match your head diameter. Sold as a set of 12 or individually as needed. Please do all your research and consult your engine builder if necessary! Black nitride valves are made from one piece forged stainless steel then go through a special hardening process to lessen the friction between the valve and guide.
Vehicle Fitment:
2009-2020 Nissan 370Z VQ37VHR
2008-2013 Infinity G37 VQ37VHR
2014-2015 Infinity Q50/Q60 VQ37VHR
• For intake valves only
| Fitment: | Size: | Includes: | Part Number: |
| Intake | +1mm Oversize 37.70mm • Stem Diameter 5.97mm • Length 100.20mm |
12 Valves | NIVN-1038-12 |
| 1 Valve | NIVN-1038-1 |
The “Black Nitride” is a hardening treatment that is applied to the whole valve whereas the chrome coating is only applied to the stem. The microhardness is higher than the stainless steel base material, keeping good ductility beneath the hard nitrided layer. Microhardness is 800HV minimum.
The Black Nitride surface finish is smoother than with chromed stems, having less friction between stem and guide. The higher the engine speed the bigger the power loss due to internal engine friction! The Black Nitride reduces this power loss due to less valve-guide friction.
Images are for reference.
| Select: | Intake 37.70mm (Set of 12) (NIVN-1038-12), Intake 37.70mm (1 Single) (NIVN-1038-1) |
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