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Supertech Performance VWIVN-1044SL Black Nitride Intake Valve Long

(2004 Volkswagen Golf R32)

Manufacturer

Picture for manufacturer Supertech Performance

Part Number

VWIVN-1044SL
8 reviews
Sale Price

$23.21

Estimated ship date Friday, November 20

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Product Details

The Supertech Performance VWIVN-1044SL is a high-performance, long-style intake valve finished in a Black Nitride treatment. Built from an enhanced EV8 (21-4N) stainless steel alloy, this valve is engineered for demanding performance engine builds where durability, flow efficiency, and heat resistance are critical.

Key Specifications:

  • Valve Type: Intake
  • Style: Long
  • Head Diameter: 33.15mm (Standard)
  • Stem Diameter: 5.97mm
  • Overall Length: 136.40mm
  • Material: Black Nitride-treated EV8 (21-4N) stainless steel
  • Groove Type: Single Groove
  • Compatible Keepers: KPR-6S/7

Key Features:

  • One-piece forged construction for superior strength and long-term reliability
  • Black Nitride surface treatment provides a harder, smoother finish than chrome-coated alternatives, reducing stem-to-guide friction and improving wear resistance
  • Hardened tip and seat contact area for extended service life under high-load conditions
  • Swirl-polished stem and undercut design enhances airflow into the combustion chamber
  • Tight manufacturing tolerances ensure consistent performance across all cylinders

Supertech's Black Nitride hardening process creates a surface that is smoother than traditional chrome coatings, resulting in reduced friction between the valve stem and guide — a key advantage in high-RPM and forced-induction applications. This valve is sold individually (per valve). Order the quantity that matches your engine's total intake valve count.

Products specifications

Fits

2004 Volkswagen Golf R32

Head Dia

33.15mm (Std)

Length

136.40mm (Std)

Material

Black Nitrided

Stem Dia

5.97mm

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