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Garage Whifbitz Toyota GR Yaris 330bhp / 350bhp / 380bhp Tuning Kits

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At Garage Whifbitz, we’ve been carrying out Toyota GR Yaris tuning conversions day in, day out for many years, continually refining our setups to deliver the best possible results.
Through extensive in-house testing and experience, we’ve developed a range of tuning kits that offer the perfect blend of power, reliability, and value for money, using only high-quality components to get the most from your GR Yaris.

🔹 GR Yaris 330bhp Tuning Kit

Our 330bhp tuning kit transforms the GR Yaris into a genuinely rapid and engaging performance car while maintaining OEM reliability and drivability.
This package delivers a substantial improvement in both power and torque, offering sharper throttle response and a much smoother power curve throughout the rev range.

Kit Includes:

  • Garage Whifbitz GR Yaris stainless steel exhaust (other brands available)
  • Garage Whifbitz GR Yaris GPF delete pipe (other brands available)
  • Eventuri Carbon Intake Kit (other brands available)
  • Airtec Toyota GR Yaris Intercooler (other brands available)
  • EcuTek custom remap

On our dyno, this setup produces around 320–330bhp when running on 99 RON high-octane fuel such as Tesco Momentum, Esso, or Shell V-Power.

🔹 GR Yaris 350bhp Tuning Kit

The 350bhp kit builds directly on our 330bhp setup, adding upgraded Kelford EZ cams and valve springs to further increase airflow and power potential at higher RPM.
This results in a more aggressive top-end and improved efficiency, while still maintaining excellent driveability for both road and track use.

Kit Includes:

  • Everything from the 330bhp Tuning Kit, plus:
    • Kelford EZ Cams
    • Kelford Valve Springs

This package produces around 350bhp on 99 RON fuel, offering stronger high-end performance and an even more exhilarating driving experience.

🔹 GR Yaris 380bhp Tuning Kit

Our 380bhp kit is the ultimate evolution of the GR Yaris tuning range. Building on the 350bhp setup, it adds a Midland Turbo hybrid turbocharger, capable of delivering serious performance gains while retaining reliable power delivery and factory-like responsiveness.

Kit Includes:

  • Everything from the 350bhp Tuning Kit, plus:
    • Midland Turbo hybrid turbocharger

When tuned on 99 RON high-octane fuel, this combination produces approximately 380bhp, transforming the GR Yaris into a truly explosive performance machine with outstanding torque and response throughout the rev range.

More Information

For more details including dyno graphs, pricing, and additional performance parts, visit our website here:
👉 Toyota GR Yaris Gen 1 (2020–2023) Performance Parts | Garage Whifbitz

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