GSC Intake Valves – Audi DAZA/DNWA 2.5L 5-Cylinder

Overview

Upgrade your Audi 2.5L DAZA/DNWA engine with GSC Power Division Stainless Steel Intake Valves (Part No. GSC2256-10), engineered to improve airflow, reliability, and performance in high-output turbocharged applications. These precision valves are crafted from premium 21-4 stainless steel and designed to handle the elevated temperatures and stresses found in forced induction engines.

The back-cut valve head improves intake flow and RPM potential, while the micro-polished stems reduce friction and oil retention — enhancing smooth operation and durability over time. For added strength, each valve features a hardened tip using mid-stem friction welding, ensuring extended life under aggressive use.

Key Features

• Back-cut design for enhanced airflow and power output
• Micro-polished stems reduce friction and oil retention
• 21-4 stainless steel construction for high-temp durability
• Friction-welded hardened valve tips for long-term wear resistance
• Direct OEM replacement — compatible with triple-groove keepers
• Ideal for high-RPM and high-boost turbocharged setups

Technical Specifications

What's Included

• 1 × GSC Power Division Stainless Steel Intake Valve (GSC2256-10)

Vehicle Compatibility

• Audi RS3 (8V / 8Y) – 2.5 TFSI DAZA / DNWA
• Audi TT RS (8S) – 2.5 TFSI DAZA
• Audi R8 5.2L V10 – optional fitment with R8 rocker arms
• Lamborghini Huracán 5.2L V10 – optional fitment (LP600, Performante, EVO, STO)

Fitment Note

Designed to work with OEM triple-groove keepers. For maximum reliability, GSC recommends replacing valve locks during installation to prevent grooving from wear.