The GFB WGA 7305 is a premium internal wastegate actuator engineered to enhance boost control for turbocharged Subaru WRX STI models from 1999 to 2021. By replacing the factory-fitted actuator, it offers improved turbo response, faster spool-up times, and maintains boost pressure more effectively at higher RPMs. This actuator is also compatible with most single-scroll IHI VF turbochargers.

GFB

Key Features:

• Enhanced Boost Control: Provides more stable and reliable boost pressure management, reducing the likelihood of boost taper at high RPMs.

• Adjustable Base Boost Pressure: Supplied with three springs (5psi, 7psi, and 10psi), allowing base boost pressure settings ranging from 5psi to 24psi. The 5psi and 10psi springs are pre-installed for a 15psi base pressure, with the 7psi spring included separately for further tuning options.

  GFB

• Unique Turnbuckle Pre-Load Adjustment: Facilitates precise adjustment of spring pre-load without removing the actuator, simplifying the tuning process.

• High-Quality Construction: Features a Nomex-reinforced silicone diaphragm and robust components designed for durability and consistent performance.

Specifications:

• Compatibility: Direct bolt-on for Subaru WRX STI models from 1999 to 2021; also fits most single-scroll IHI VF turbochargers.

• Adjustable Boost Range: 5psi to 24psi, depending on spring combination and pre-load settings.

Installation Notes:

• Professional Tuning Required: Installing this actuator will increase boost pressure; therefore, engine tuning is necessary to ensure optimal performance and prevent potential engine damage.

• Spring Configuration: The actuator comes with 5psi and 10psi springs pre-installed (yielding a 15psi base pressure). The 7psi spring is included separately for additional tuning flexibility.