2004-2009 6.6L Duramax GT3794VA Stage 1 Turbo Kit (773540-5001S)

The Garrett 773540-5001S GT3794VA is a Stage 1 performance turbocharger upgrade designed for the 2004.5–2009 GM 6.6L Duramax (LLY/LBZ/LMM). Engineered as a direct, drop-in replacement, this turbo delivers noticeable gains in horsepower and torque while improving throttle response and lowering exhaust gas temperatures (EGTs).Equipped with an advanced aero compressor wheel and a variable geometry turbine (VGT) system, the GT3794VA offers rapid spool-up and a broad, efficient powerband. This makes it an excellent choice for drivers seeking more performance without extensive modifications. With proper supporting upgrades, the GT3794VA is capable of supporting up to 550 horsepower, making it ideal for mild to moderate performance builds.

Part Number: 773540-5001S

• Direct, drop-in turbocharger upgrade.
• Advanced aero compressor wheel for increased airflow.
• VGT technology for fast spool-up and reduced turbo lag.
• Improves horsepower and torque.
• Up to 550hp capability with supporting modifications.

• (1) Garrett GT3794VA Turbocharger
• (1) VGT Solenoid
• (1) Installation O-ring Kit
• (1) Installation Hardware Kit

• Custom tuning is required for optimal performance and to prevent check engine lights.
• Professional installation is highly recommended.
• This turbocharger is designed to work with stock manifolds and downpipes.