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Toyota GR Yaris Tuned at Whifbitz – 352BHP Result!

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Another Toyota GR Yaris has been through the Whifbitz workshop for tuning and performance upgrades. This one came in with a great selection of parts already fitted, and we added a few finishing touches before carrying out a custom Ecutek remap on our in-house dyno.

Spec on Arrival

This GR Yaris came in already fitted with:

  • Eventuri carbon intake
  • Milltek exhaust & GPF pipe
  • Wagner Tuning intercooler and hard pipe kit
  • Kelford 267A cams & valve springs
  • Ecutek ECU tuning platform

Work Carried Out at Whifbitz

While it was with us, we fitted a Weldspeed inlet manifold to improve airflow and get the most out of the existing setup.


With all the hardware in place, we then carried out a full custom Ecutek remap on our dyno to make sure everything worked perfectly together.

After mapping, it’s now making 293whp which is 352BHP and pulling hard right through the rev range.

The end result is a GR Yaris that feels sharper, stronger, and more responsive than before – with solid gains across the rev range.

Get in touch if you’d like your GR Yaris tuned, serviced, parts supply or just advice.

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