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Supertech Performance HIVN-1102 Black Nitrided Intake Valve Oversize - 1mm

(1992-2005 Honda Civic; 1993-1997 Honda Civic del Sol)

Manufacturer

Picture for manufacturer Supertech Performance

Part Number

HIVN-1102
10 reviews
Sale Price

$21.09

Estimated ship date Friday, November 20

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Product Details

The Supertech Performance HIVN-1102 is a Black Nitrided +1mm oversize intake valve engineered for high-performance and racing applications. Featuring a 31.00mm head diameter, 5.48mm stem diameter, and 118.50mm overall length, this valve is precision-manufactured to deliver superior flow, durability, and consistency under demanding engine conditions.

Constructed from EV8 (21-4N) stainless steel as a single-piece forged component, the HIVN-1102 provides exceptional strength and reliability. Supertech's rigorous heat treatment process ensures optimal hardness levels tailored to high-performance engine requirements. CNC finishing to strict tolerances makes these valves a trusted choice for the most demanding race classes.

Black Nitride Coating Advantages:

  • Minimum microhardness of 800HV — harder than the stainless steel base material while retaining ductility beneath the nitrided layer
  • Smoother surface finish compared to chrome-coated stems, reducing friction between valve stem and guide
  • Coating is bonded at a microscopic level — will not flake or crack upon valve-to-piston contact
  • Applied to the entire valve surface (unlike chrome coating, which is stem-only)
  • Reduces power loss from valve-guide friction, especially at high RPM

Construction & Specifications:

  • Valve Type: Intake
  • Material: EV8 (21-4N) Black Nitrided Stainless Steel
  • Head Diameter: 31.00mm (+1mm oversize)
  • Stem Diameter: 5.48mm
  • Overall Length: 118.50mm

Supertech valves are sold individually (per valve). Please order the quantity matching the number of intake valves required for your engine build.

Products specifications

Fits

1992-2005 Honda Civic; 1993-1997 Honda Civic del Sol

Head Dia

31.00mm (+1.0)

Length

118.50mm

Material

Black Nitrided

Stem Dia

5.48mm

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