As the ultimate GR Corolla, the GRMN Corolla enables a higher level of driving performance starting with the powertrain. Although it keeps the G16E-GTS, the 1.6-liter turbocharged 3-cylinder receives additional torque (415 Nm versus 400 Nm) compared to the bog-standard GR Corolla. Beyond the peak torque figures, engineers improved mid-range torque (3,600 to 4,800 rpm). Peak output remains at 304 horsepower (224 kW).

The big difference lies in both aero and handling upgrades. The GRMN Corolla features exclusively developed aerodynamic performance parts for enhanced road holding. Its hood duct, fender ducts, front side spoilers, and rear wing incorporate know-how gained from racing, finetuned at the Super Taikyu Series and the Nürburgring. The biggest change is the adjustable rear wing which has a five-step adjustment mechanism.

Meanwhile, the GRMN Corolla’s suspension employs exclusive front and rear monotube shock absorbers with rebound springs for improved inner-wheel traction during cornering and for enhanced high-speed cornering performance. The exclusive shock absorbers were developed by adjusting their stroke down to a millimeter at the front and rear for optimal balance. Furthermore, for enhanced cornering stability and braking performance, the GRMN Corolla sports 245/40ZR18 Michelin Pilot Sport Cup 2 high-grip tires—10 mm wider than stock.

Moreover, the GRMN Corolla’s EPS (electric power steering) has been modified to provide additional assistance torque even during cornering under high g-forces. And the exclusively tuned 4WD control system provides optimal rear torque distribution during straight-line driving and enhanced stability at the onset of steering input at extremely high speeds.

Finally, in pursuit of an even higher level of performance, the GRMN Corolla has no rear seats as part of an effort to achieve thorough weight reduction. The power-to-weight ratio has been improved by reducing weight by 30 kilograms compared to the regular GR Corolla.

Communicating the newfound performance, the GRMN Corolla has custom-designed full bucket driver’s seat to achieve holding performance capable of withstanding higher lateral g-forces. The carefully adjusted seat length facilitates clutch operation, and the seat’s glass fiber-reinforced polymer (GFRP) construction helps reduce weight. This was done considering everyday ease of ingress and egress.

Carbon fiber ornamentation—developed and manufactured by the Carbon Section at Toyota Motor Corporation’s Motomachi Plant—adorns the instrument panel on the passenger side. Other special items include instrument panel padding bearing Morizo’s signature, door trim and shift knob accented in Alumite Red, and a GRMN-exclusive serial number plate.

So far, the GRMN Corolla will go on sale in markets such as Japan, Australia, and North America. No word if other left-hand drive markets such as the Philippines will get it.

Also currently under development is the GR Corolla Morizo RR, an ultimate 5-seater model of the GR Corolla equipped with the 8-speed Direct Automatic Transmission. This one will be unveiled at a later date.