GFB 4003 STi 6-Speed Short Shift Basic Kit

🔧 Product Description

The GFB 4003 STi 6-Speed Short Shift Basic Kit from Go Fast Bits is a cost-effective upgrade designed to deliver shorter, sharper gear shifts without the need for a full aftermarket shifter system.

Developed from GFB’s flagship 4002 short shifter kit, the Basic version utilises the same adjustable gear lever but omits the linkage clamp—making it a more affordable option while still significantly improving shift feel and throw.

⚙️ Key Features

• Part Number: 4003
• Designed for Subaru STi 6-speed transmissions
• Adjustable short shift throw
• Uses proven design from GFB 4002 kit
• Upgradeable to full 4002 kit (add linkage clamp later)
• Includes purpose-built pin removal tool
• Fast installation (~30 minutes) from inside the vehicle

🏁 Performance Benefits

• ⚡ Shorter, quicker gear changes
• 🎯 Improved shift precision and feel
• 🛠 Reduced driver effort between gears
• 💰 More affordable alternative to full kits
• 🔄 Future upgrade path available

📏 Shift Throw Adjustment

• Adjustable from factory throw down to ~32–35mm per gate
• Provides a noticeable improvement without being overly aggressive

👉 For comparison:

• Adding the optional linkage clamp (4002 upgrade) reduces throw further to ~20–22mm per gate

This makes the Basic kit ideal for drivers who want improvement without extreme short shifts.

💡 Why Choose the Basic Kit?

• Perfect if the full 4002 range is too aggressive
• Retains a comfortable, usable shift feel
• Lower cost with the option to upgrade later
• Ideal for daily-driven STi builds

👉 It’s a “best of both worlds” solution—performance now, upgrade later if needed.

🛠️ Installation

• Installs entirely from inside the vehicle
• Approx. 30-minute install time
• Includes a custom pin-press tool for easy fitment
• No complex modifications required

🚗 Vehicle Fitment

Subaru STi (6-Speed Models):

• Subaru WRX STI MY02 (“Bugeye”)
• Subaru WRX STI MY08-13
• Subaru WRX STI 2014+ (EJ25)

🔩 Specifications

• Product Type: Short shift kit (basic)
• Transmission: 6-speed manual
• Adjustment Range: Factory to ~32–35mm per shift
• Upgrade Option: Compatible with GFB 4002 linkage clamp
• Install Time: ~30 minutes
• Brand: Go Fast Bits (GFB)

🏆 Perfect For

• STi owners wanting better shift feel without extreme reduction
• Daily drivers and street builds
• Enthusiasts looking for a budget-friendly upgrade
• Anyone wanting upgrade flexibility later

✅ Summary

The GFB 4003 STi Short Shift Basic Kit is a smart, affordable upgrade that delivers crisper, shorter gear shifts without going overboard. With easy installation and the ability to upgrade to the full 4002 kit later, it’s the perfect entry-level short shifter for Subaru STi enthusiasts.