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Supertech Performance NEVN-3470F Exhaust Valve +1.5mm Black Nitrided Stainless Steel Flat Face

Manufacturer

Picture for manufacturer Supertech Performance

Part Number

NEVN-3470F
10 reviews
Sale Price

$21.91

Estimated ship date Saturday, November 21

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Product Details

The Supertech Performance NEVN-3470F is an oversized exhaust valve engineered for high-performance and modified engine applications. Featuring a +1.5mm oversize head diameter of 34.80mm, a 6.95mm stem diameter, and an overall length of 98.30mm, this valve is built to improve exhaust flow and support increased power output.

Manufactured from stainless steel with a Black Nitride surface treatment, this one-piece forged valve delivers a harder, smoother stem surface compared to chrome-coated alternatives, reducing friction between the valve stem and guide for longer service life under demanding conditions. The flat face and undercut stem profile further optimize flow characteristics and reduce valve head mass.

Key Specifications:

  • Head Diameter: 34.80mm (+1.5mm oversize)
  • Stem Diameter: 6.95mm
  • Overall Length: 98.30mm
  • Material: Stainless Steel (23-8N)
  • Coating: Black Nitride hardening treatment
  • Face Style: Flat
  • Stem Profile: Undercut
  • Groove Type: Single Groove
  • Valve Type: Exhaust

Key Features:

  • One-piece forged stainless steel construction for superior strength and reliability
  • Black Nitride coating produces a harder surface than chrome with improved surface smoothness
  • Microhardness exceeds 800HV minimum for long-term durability under high heat
  • Undercut stem reduces valve head weight and improves high-RPM stability
  • Swirl polish finish promotes consistent seating and sealing performance
  • Single groove keeper design compatible with standard retainer configurations

Sold individually — per valve. Order the exact quantity of valves required for your engine build.

Products specifications

Head Dia

34.80mm (+1.5)

Length

98.30mm

Material

Black Nitrided

Stem Dia

6.95mm

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