Supertech Performance AIVN-1103S-12 Black Nitrided Intake Valve Set (12-Pack) for Audi/VW 1.8T 5V

These valves are ideal for cylinder head builds, performance upgrades, and engine rebuilds requiring enhanced airflow and durability.

Technical Specifications:

• Head Diameter: 26.90mm (standard size)
• Stem Diameter: 5.96mm
• Overall Length: 105.09mm
• Material: Black nitrided stainless steel (21-4N)
• Valve Type: Intake
• Groove Type: Single groove design for high RPM applications

Key Features:

• Black nitride coating provides superior hardness and wear resistance across the entire valve surface
• Forged one-piece construction from premium stainless steel ensures maximum strength and reliability
• Single groove keeper design optimized for high RPM performance and racing applications
• Hardened valve tips exceed 52 HRC for extended service life
• Precision-ground and superfinished for optimal sealing and performance

Important Installation Note: These valves require single groove keepers part number KPR-6S/7 (two keepers per valve, sold separately). It is recommended to install these valves with upgraded valve springs and valve stem seals for maximum performance and reliability.

Supertech Performance valves are trusted by engine builders and tuners worldwide for drag racing, road racing, rally, and high-performance street applications. Each valve is manufactured to exacting standards to deliver the airflow improvements and durability needed for demanding motorsports use.