Supertech Black Nitrided Intake Valve (w/Hydraulic Lifters) RB20 +1mm – Terra Firma Automotive

Supertech Black Nitrided Intake Valve (w/Hydraulic Lifters) RB20 +1mm Oversize NIVN-1042

  • Sale
  • Regular price $25.44

ETA 1-4 Weeks Please note all times are estimates

Supertech intake valves are made exclusively from an enhanced versions of EV8 (21-4N) steel. This is the highest grade of steel available and provides the strength to withstand just about any application. Supertech exhaust valves are made from EV16 (21-8N) or EV8-Nb/w for greater strength at higher temperatures. Some applications call for us to harden certain areas such as the tips and or the seats. For these applications we will often times weld other hard metal alloys to the valve for increased durability.

Black Nitride Coating


This is a hardening treatment that has been steadily growing in popularity over the last several years. These black Nitride coated valves feature harder surfaces and smoother finishes, providing less friction and subsequently longer life. 

  • Sold Per Valve
  • Head Diam: 31.10mm (+1mm)
  • Stem Diam: 5.97mm
  • Length: 90.7mm
  • Material: Black Nitrided
  • Valve Type: Intake
  • Fits HCR32 GTST
  • Fits HNR32 GTS4
  • Fits HR32 GTS
  • Fits RB20

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