GFB-7109 9 psi (Middle) Wastegate Spring

GFB-7109 9 psi (Middle) Wastegate Spring – Suits EX50 Wastegate (Part 7001)

🔧 Product Description

The GFB‑7109 9 psi Middle Spring is a genuine Go Fast Bits (GFB) replacement and tuning component designed for use in the EX50 external wastegate (Part 7001). As the middle spring in the EX50’s modular spring system, it establishes a base opening pressure around 9 psi (~0.62 bar) and can be used on its own or stacked with other EX50 springs to achieve a wide range of boost settings.

This spring is ideal for tuners who want reliable, repeatable wastegate control and flexibility in tailoring boost control to match turbo and engine characteristics.

⚙️ GFB-7109 9 psi (Middle) Wastegate Spring Key Features

• Genuine GFB inner/middle wastegate spring (Part No. 7109)
• Rated ~9 psi for use as the middle spring
• Designed specifically for GFB EX50 50 mm external wastegates (7001)
• Precision‑formed for consistent actuator operation and boost response
• Used alone for ~9 psi setups or stacked with inner/outer springs for higher pressures

🚗 Fitment

• GFB EX50 External Wastegate (Part No. 7001)
• Suitable for custom turbo manifold and high‑performance applications
• Works with GFB’s modular spring system to build specific boost targets

🏁 Performance Benefits

• Sets the wastegate opening pressure to ~9 psi when used alone
• Provides predictable and stable boost control
• Offers flexibility when used with other EX50 springs (e.g., 7 psi inner or 13 psi outer)
• Helps eliminate boost creep and improves throttle response

🔩 Specifications

• Part Number: 7109
• Location: Middle spring inside the EX50 wastegate
• Approx. Rating: ~9 psi (~0.62 bar)*
• Application: EX50 external wastegate boost tuning
• Brand: Go Fast Bits (GFB)
• *Actual effective boost pressure may vary depending on your specific turbo, manifold geometry, and engine setup.

🛠️ Installation Notes

• Installed inside the wastegate actuator under the cap
• Can be used alone for ~9 psi base boost, or stacked with other springs for higher targets
• Always refer to GFB’s official instructions when stacking springs to ensure correct sequence and orientation

🧠 Why This Spring Matters

The spring inside an external wastegate controls when the valve starts to open as boost rises. The middle spring is a common choice for moderate boost base levels and can be tuned further by pairing with the supplied inner or outer springs.

🔄 Common EX50 Spring Combinations

Here’s how the 7109 spring is used in typical setups:

(*Pressure values are approximate and can vary with setup.)

📌 Summary

The GFB‑7109 9 psi Middle Spring is a core tuning component for the EX50 external wastegate (7001), providing a reliable opening pressure around 9 psi and flexibility when tuning with additional springs. It’s essential for precise wastegate control and custom boost tuning.