HPF STAGE 1 | 215KW

GR YARIS | STAGE 1 | 215KW

The HPF Stage 1 upgrade for the Toyota GR Yaris is engineered to unlock the vehicle’s untapped performance potential by enhancing airflow, strengthening valvetrain stability, and delivering a fully customised ECU calibration. This package provides a sharper, more responsive driving experience while maintaining the reliability and daily usability expected from Toyota’s flagship performance hatch.

Our trained technicians begin with a baseline dyno run to verify the vehicle’s condition and establish accurate factory power and torque figures. This ensures the upgrade is built on a solid foundation and allows us to provide a precise before‑and‑after comparison once tuning is complete.

We then install the AFE Power cold‑air intake, designed to improve airflow volume and reduce intake restriction. This upgrade allows the turbocharger to spool faster and maintain boost more efficiently across the rev range. To complement the improved intake system, we fit the Invidia Q300 cat‑back exhaust, enhancing exhaust flow and giving the GR Yaris a deeper, more refined performance tone without excessive cabin noise.

To support higher boost levels and sustained high‑RPM operation, we upgrade the valvetrain with Kelford Cams KVS264 valve springs. These springs provide increased seat pressure and stability, ensuring reliable performance under aggressive driving and tuning conditions.

With the hardware installed, we move to the calibration phase. Using the latest tuning tools, we perform a custom ECU remap and full dyno recalibration, optimising boost control, fuel delivery, ignition timing and torque management strategies. This tailored approach ensures the upgraded components work together seamlessly, delivering stronger mid‑range torque, improved throttle response and a more engaging power curve.

The upgrade is finalised with comprehensive dyno and road testing, allowing us to refine drivability, confirm consistency under load, and ensure the vehicle performs flawlessly in real‑world conditions. At completion, you will receive a dyno graph showing the before‑and‑after gains achieved by the HPF Stage 1 package.

The HPF Stage 1 upgrade provides a strong foundation for future performance enhancements, offering a modular pathway for customers who wish to progress to higher stages without duplicating costs. As always, HPF is committed to delivering maximum performance using high‑quality components while maintaining the reliability and drivability that GR Yaris owners expect.

PLEASE NOTE : The Horsepower Factory (HPF) has no affiliation with Toyota or Subaru and service offered by our company may impact on your vehicle manufacturer warranty as well as the fuel efficiency and emissions of your vehicle.

Package Includes

1 x Before dyno run
1 x Custom remapping    
1 x AFE Power Cold air intake    
1 x Invidia Q300 Catback Exhaust     
1 x Kelford Cams Valve Springs - KVS264    
1 x Labour to fit, tune and test
1 x Custom ECU Recalibration Dyno Tune

Key Features

Good power gains, optimisation of the tune to suit 98 octane fuel, with zero down sides.

Notes

*Please note: Power figures are estimates only and actual figure's may vary.

• We recommend all vehicles coming to HPF for tuning run 98 Octane fuel. Please contact us if you have a need to use different fuel.
• Power figures listed are estimated kilowatts at the flywheel based on results typically obtained by HPF on HPF’s dynos. Typically these are based of a manual vehicle with standard driveline and standard wheels and tyres. Actual power can vary based on each specific vehicle.
• Modifications such as this package require the vehicle to be in excellent mechanical order.
• We advise against increasing the power output substantially on high kilometer engines, if your engine has in excessive of 150,000kms please contact us to discuss options.
• Whilst every attempt is made to ensure prices listed online are correct, they are subject to change at any time.
• Additional parts may be required in some cases depending on the condition of the vehicle. Cost of these parts and additional labor required may incur additional cost.
• Images are for illustration purposes only

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