🔧 WASTEGATE ACTUATOR – MITSUBISHI EVO 4–8 (WGA 7301)

⚡ HIGH-PERFORMANCE INTERNAL WASTEGATE UPGRADE FOR PRECISE BOOST CONTROL

The GFB Wastegate Actuator (WGA 7301) is a high-performance replacement for the factory actuator on Mitsubishi EVO 4–8 turbocharged engines, designed to deliver stronger boost control, improved stability, and greater tuning flexibility.

By increasing diaphragm surface area and improving mechanical control over the wastegate flap, the WGA reduces boost creep and improves overall turbo response under load.

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⚙️ HOW IT WORKS

Compared to the factory actuator, the GFB WGA features:

✔ Larger diaphragm area for increased control force
✔ Stronger resistance against exhaust backpressure
✔ Improved wastegate flap authority under boost
✔ More consistent boost curve across RPM range

👉 Result: more stable, predictable, and tunable boost control.

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🚀 PERFORMANCE BENEFITS

⚡ Stronger Boost Control
Prevents exhaust pressure from forcing the wastegate open prematurely.

🎯 More Stable Boost Curve
Reduces boost creep and irregular boost spikes.

🔧 Improved Tuning Control
Allows precise adjustment of base boost pressure.

📈 Higher Boost Potential
Supports higher boost levels compared to OEM actuator.

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🧠 ADJUSTABLE SPRING SYSTEM

The WGA includes 3 interchangeable springs and a turnbuckle preload adjustment system, allowing fine tuning of base boost pressure.

🔩 Adjustment Range:

• 5 psi to 24 psi base boost capability

🛠 Factory Configuration:

• 10 psi + 7 psi springs installed
• Approx. 17 psi base setup
• Additional 5 psi spring included for tuning flexibility

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⚙️ ENGINEERING FEATURES

✔ High-strength diaphragm construction
✔ Extended stroke design for better control range
✔ Compact body with reduced height for fitment flexibility
✔ Precision turnbuckle preload adjustment
✔ Built for high-boost performance applications

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🚗 APPLICATION

• Mitsubishi Lancer EVO 4
• Mitsubishi Lancer EVO 5
• Mitsubishi Lancer EVO 6
• Mitsubishi Lancer EVO 7
• Mitsubishi Lancer EVO 8

(Factory internal wastegate turbo models)

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🛠 INSTALLATION NOTES

✔ Direct bolt-on replacement for OEM actuator
✔ No fabrication required
✔ Adjustable base boost setup required after installation
⚠️ TUNING IS REQUIRED after installation

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⚠️ IMPORTANT NOTICE

This product is a performance tuning component, not a simple replacement part.

Installing this actuator will:

• Increase boost pressure potential
• Alter factory boost control behaviour
• Require ECU tuning for safe operation

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💡 WHY CHOOSE THE GFB WGA?

If you want:

• Better boost stability on EVO turbo setups
• Stronger wastegate control under load
• Adjustable base boost tuning capability
• More reliable performance than OEM actuators

👉 The WGA 7301 is a serious upgrade for tuned EVO applications

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🏁 PERFECT FOR

• EVO street performance builds
• Turbocharged tuning setups
• Boost control upgrades
• Motorsport and track applications
• Owners running higher-than-stock boost levels