GR Yaris

This Toyota GR Yaris arrived with us towards the end of November / early December with a serious issue – an unmistakable engine knock that required immediate investigation. Diagnosis & Strip Down After bringing the car into the workshop, we carried out a full inspection and engine strip-down. The cause of the noise was quickly […]

This Toyota GR Yaris was in the Whifbitz workshop recently for a selection of performance, reliability and driver-focused upgrades. Rather than tuning, this build concentrated on strengthening key components, improving under-bonnet reliability and enhancing the overall driving experience with carefully chosen parts. Engine & Reliability Upgrades Driver Interface & Controls Engine Bay & Practical Enhancements […]

The car arrived with a strong selection of supporting modifications already fitted, allowing us to focus purely on optimising the ECU calibration using EcuTek software on recommended 99 RON fuel. Existing Modifications ECU Calibration Power Results A strong 46bhp increase, delivering improved throttle response, stronger mid-range and smoother overall power delivery. Considering an EcuTek Tune […]

This Toyota GR Yaris was in the Whifbitz workshop recently for our usual, tried-and-tested upgrade setup. The car arrived with a strong base of modifications already fitted, and we completed the build with further performance, drivability and chassis upgrades, finishing with a custom EcuTek calibration to tie everything together. Existing Modifications Engine & Performance Upgrades […]

We’ve recently had a Toyota GR Yaris in the Whifbitz workshop for installation of Kelford performance camshafts and uprated valve springs. The GR Yaris is an impressive car straight from the factory, but with the right supporting hardware, there’s still more performance available—particularly at higher RPM once tuned. Why Upgrade to Kelford Cams? Kelford are […]

Intake, Engine Bay & Aero Upgrades We’ve had another Toyota GR Yaris through the Whifbitz workshop, this time for a carefully selected set of upgrades aimed at improving airflow, usability, and OEM+ performance. The GR Yaris is already an incredible bit of engineering, but as always, there’s room to refine and enhance key areas without […]

We recently had this Toyota GR Yaris in the workshop for a solid round of performance upgrades and an ECUTEK remap, transforming an already quick hot hatch into something seriously special. The GR Yaris is an incredible platform from the factory, but with the right supporting mods and calibration, there’s a lot more performance waiting […]

Another Toyota GR Yaris has left the Garage Whifbitz workshop fully transformed, packing a huge increase in performance thanks to a comprehensive list of power upgrades and styling enhancements. This build pushes the incredible G16E-GTS platform even further, now producing 430bhp, delivering explosive acceleration and relentless mid-range power while retaining excellent drivability. Power Modifications To […]

One of our best customer’s Gen 1 GR Yaris now running a Gen 2 front bumper conversion along with Sard GT1 carbon fibre front splitter, Sard GT1 vented front wings or fenders if you’re American 😎and our Whifbitz VS style carbon rear diffuser. As far as we know its the first GR Yaris in the […]

Another stunning Toyota GR Yaris through the Garage Whifbitz workshop this week for a range of upgrades and a custom remap. We fitted: Existing Performance Mods This GR Yaris already had some great supporting mods fitted, including: Dyno Results As always, we tested the car on our dyno before tuning. Another great result from a […]

This GR Yaris came in for some love and performance upgrades — and we delivered! Upgrades fitted: ✅ MST V2 intake kit✅ Whifbitz resonated stainless exhaust system✅ AIRTEC intercooler Once everything was installed, we strapped it onto our dyno and were surprised to see just 247bhp, well below the 260bhp we usually see from a […]

We recently had this stunning Toyota GR Yaris in the Whifbitz workshop for a few performance upgrades. This car already came to us with some tasty mods — an aftermarket exhaust system (brand unknown) and an Airtec intake kit. The owner wanted to take things a step further, so it was booked in for an […]

Another Toyota GR Yaris has been in the Whifbitz workshop for some performance upgrades. This particular car arrived already fitted with a Milltek exhaust system and GPF pipe. We installed an Eventuri carbon intake kit and carried out a custom ECU remap using Ecutek tuning software. On the dyno, the Yaris initially made 252whp (305bhp) […]

Another Toyota GR Yaris tuned remotely on Ecutek, and this one’s all the way from Martinique in the Caribbean! This GR Yaris features an impressive list of upgrades: Despite only having 95RON fuel available in Martinique, this car produced 274whp (around 330bhp) — roughly 20bhp down on what it would make on UK 99RON fuel, […]

Watch our Toyota GR Corolla / GR Yaris G16E-GTS engine build time-lapse — transforming Toyota’s incredible 1.6L 3-cylinder turbo engine into a forged, boost-ready powerhouse. Built in-house at Garage Whifbitz, this setup is engineered to handle 420+ bhp with ease. Engine build specs: Nitto forged conrods CP Pistons DP H11 head studs HKS multi-layer steel […]

Another GR Yaris through the Whifbitz workshop for tuning and mapping! Spec on Arrival This GR Yaris came in with the following parts already fitted: A nice setup that already improved flow and sound, but it was still running the stock intercooler and an older tune. Work Carried Out at Whifbitz We fitted a new […]

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 […]

Another Toyota GR Yaris mapped on Ecutek remotely, this customer lives in Guernsey and we mapped it from our Whifbitz HQ in Wales 😎 This particular GR Yaris is mainly used for hill climb events with some tasty mods including Eventuri intake, Milltek exhaust, Airtec intercooler and GPF delete with an estimated power figure of […]

The Toyota GR Yaris is already an incredible hot hatch straight from the factory, but when it came into the Whifbitz workshop, the owner wanted even more performance and refinement. This particular car already had an impressive list of modifications fitted before it arrived, and we took it to the next level with a fresh […]

This 2020 Toyota GR Yaris went from having minor modifications to what you see here, a fully modified fire breathing GR Yaris which would be happy on a rally stage! The customer wanted his Toyota GR Yaris to handle as much power as possible so it had one of our signature full race engines featuring […]

We had another Toyota GR Yaris in the Whifbitz workshop today, this time in for an oil service using Millers Oils along with an Ecutek remap and some carefully chosen performance upgrades. Mods already fitted to this GR Yaris: ✅ Akrapovic exhaust & GPF delete – freeing up flow and sharpening the exhaust note✅ Eventuri […]

Another Toyota GR Yaris has been through the Whifbitz workshop, this time for a full round of upgrades to improve performance, handling, and braking. Power Upgrades When the car arrived, it was already running some great mods, including: To push things further, we fitted an Eventuri carbon fibre intake kit and carried out a custom […]

The Toyota GR Yaris came in for a custom Ecutek remap on the Whifbitz dyno and put down an impressive 307bhp. Current mods fitted: HKS turbo muffler exhaust, Eventuri intake kit and Turbosmart BOV. Ecutek features unlocked:✅ Rolling antilag✅ Flat-foot shifting✅ Launch control This GR Yaris is already a serious little weapon, but with an […]

Another GR Yaris has been in the Garage Whifbitz workshop this week for a performance upgrade using the powerful Ecutek tuning software. Already running a solid list of supporting mods, this little rally weapon was ready for some extra power. Current Setup This GR Yaris came to us already equipped with: The Tune With the […]