Black Nitride +1mm Supertech intake valves for VW/Audi 1.8T 20V engines. Boost flow, strength, and durability in high-boost turbo builds.
Main Product Description:
Supertech’s +1mm oversize Black Nitride intake valves are engineered for VW/Audi 1.8T 20V engines (058 & 06A). Forged from EV8 (21-4N) stainless steel, these valves deliver exceptional strength for high-boost and high-RPM performance.
Their Black Nitride surface hardening minimizes friction and wear, while enhancing sealing and flow. Single-groove tips are ideal for high-RPM keeper systems that grip the shaft directly—perfect for track or big-turbo builds.
Specs:
• Head Diameter: +1mm Oversize
• Material: EV8 Stainless Steel (21-4N)
• Coating: Black Nitride
• Groove Type: Single Groove
• Engine Fitment: VW/Audi 1.8T 20V (058 & 06A)
Valve Kit Contents:
• 12 Intake Valves (full set for 1.8T 20V)
• Keepers not included — use KPR-6S/7 (2 per valve)
• Valve seals sold separately (12 required)
⚠️ Oversized valves require head machining. These are not drop-in parts—professional installation and tuning are recommended.
