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This Has to be the Most Purposefully Modified Toyota GR Yaris on the Planet

Mighty Car Mods built the ultimate Toyota GR Yaris track weapon

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The Toyota GR Yaris was one of the most unexpected cars to come from Toyota. By all accounts, it can be viewed as the spiritual successor to the Toyota Celica GT Four, despite the GR Yaris not being entered in rallying yet. The DIYers from Mighty Car Mods have taken it upon themselves to utilize all available aftermarket modifications for the GR Yaris in order to create the ultimate version of the compact hot hatchback. Can they build the most powerful GR Yaris yet?

The main principle of modifying a turbocharged car is “keep it cool”

This Has to be the Most Purposefully Modified Toyota GR Yaris on the Planet
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The top of the cherry
Lightweight Advan wheels not only improve aesthetics, but reduce unsprung weight. Sipe up to see the actual process with detailed explanation

“Keeping the airflow going” is important for any car, but even more so for ones that feature forced induction. Heat-soaking is an issue on prolonged track sessions, which is what the GR Yaris is meant for. A thicker intercooler is in order, so the rally-bred hatchback can run cooler for longer. While the aftermarket piece is not much bigger than the stock one, it works fine for the stock boost.

The same goes for the brakes, which also need to be able to dissipate heat during a track session. The addition of brake-cooling ducts is often overlooked, but the guys at Mighty Car Mods bless the GR Yaris with this seemingly minor, but important mod.

Complementary track mods

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Keeping a turbocharged car cool is important
Heat-soaking is best tackled with a bigger intercooler. Brake cooling ducts also make sure the GR Yaris has consistent stopping power

A less restrictive exhaust is a crucial performance mod for any project car and Mighty Car Mods went for an HKS Super Turbo kit, which is both lighter and louder than the stock exhaust, and we already know how awesome the GR Yaris sounds with an aftermarket exhaust.

A cone-air filter is something you can go without, but in order to optimize the intake airflow of the small inline-three, they proceed with the installation. To keep the oil at an optimal temperature, the GR Yaris also gets a front-mounted oil cooler. This also requires additional oil in order to account for the extra capacity added.

Lower center of gravity

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Improved stopping power
If it goes fast it needs to stop just as fast. The GR Yaris gets high-performance brake pads and titanium backing plates

Installing lowering springs is the logical mod for any track-day car. The GR Yaris gets Whiteline lowering springs, which turns out to be a simple installation since the shocks and springs on the hot hatch are separate. The benefits of a lower center of gravity are obvious so we’ll save you the explanation, but essentially, it has a lot to do with improved stability and weight transfer.

More air ducts

This Has to be the Most Purposefully Modified Toyota GR Yaris on the Planet
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The Toyota GR Yaris is a rally-bred hot hatch and an impressive platform
At the hands of legendary DIYers, the homologation-special Yaris reveals its full potential

The GR Yaris is getting put together after all the aforementioned mods have been done to it. The front fascia gets two new openings at the bottom for the new brake-cooling ducts and an aftermarket undercover, which features air ducts for cooling the transfer case, engine, and transmission.

The three principles of building a track car

This Has to be the Most Purposefully Modified Toyota GR Yaris on the Planet
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The obligatory aftermarket exhaust
GR Yaris gets an aggressive HKS Super Turbo exhaust. It also gets a cone air filter

Mighty Car Mods just built the best track version of the GR Yaris, without resorting to cranking up the boost (not yet anyway). While we know the G16E-GTS engine can reliably push 36 PSI and nearly 500 horsepower, the DIYers focused on three important aspects – maximized airflow and cooling, stability, and lightness.

In stock form, the Toyota GR Yaris packs 268 horsepower at 6,500 RPM and 273 pound-feet (370 Nm) at 3,000 to 4,600 RPM. With all the mods installed so far, the GR Yaris not only has a bit more than that but also gets to use its full power for much longer, before heat-soaking starts taking its toll. Last but not least, new track-focused brake pads and titanium backing plates make it onto the GR Yaris’ already impressive braking system. To top it all off, the GR Yaris gets Advan RC3 lightweight wheels for a more aggressive stance and more importantly, reduced unsprung weight.

Dim Angelov
Dim Angelov
Born in 1992, I come from a family of motoring enthusiasts. My passion for cars was awoken at the age of six, when I saw a Lamborghini Diablo SV in a magazine. After high school I earned a master’s degree in marketing and a Master of Arts in Media and Communications. Over the years, I’ve practiced and become skilled in precision driving and to date have test driven more than 250 cars across the globe. Over the years, I’ve picked up basic mechanical knowledge and have even taken part in the restoration of a 1964 Jaguar E-Type and an Alfa Romeo Giulia Sprint. Lately, I’ve taken a fancy to automotive photography, and while modern cars are my primary passion, I also have a love for Asian Martial Arts, swimming, war history, craft beer, historical weapons, and car restoration. In time, I plan my own classic car restoration and hope to earn my racing certificate, after which I expect to establish my own racing team.  Read full bio
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