Engineered by algorithm. Validated in CFD.

The GR Corolla is a rally car for the road: all-wheel drive, a turbo three-cylinder, and a chassis built to be driven hard. Its aero tells a different story. At 112 mph (180 km/h), the stock car makes nearly 470 N (106 lbs) of lift, meaning air pushing the car up, off the road. Most of it is at the rear, which is the last thing you want when you’re committed to a fast corner.

THE KIT

Every part in the kit was refined with the same computer optimization methods used in Formula 1, then tested together in a full-car airflow simulation (CFD). The result: nearly 470 N of lift becomes over 460 N (103 lbs) of downforce, a swing of more than 900 N (about 200 lbs) pressing the car into the road instead of lifting it. Front downforce more than triples, so the car turns in with real bite, and rear lift drops by 60 percent, so the back stays planted in fast corners where the stock car goes light. Figures are for the complete kit, not this part on its own.

DESIGN

The Prepreg Carbon Fiber Hood replaces the factory GR Corolla hood and is much lighter than stock. Its vents open straight through to the engine bay, and one sits directly over the air intake, so the intake sound reaches the cabin much louder than it does with the factory hood. Because the intake is visible through the vent, an aftermarket intake becomes part of the look of the car.

CONSTRUCTION

Under the hood, a Kevlar layer adds strength and resists the heat coming off the engine. The carbon fiber itself is prepreg: resin is worked into the weave at a controlled ratio, then cured under heat and pressure, the same process used in motorsport and aerospace. Less excess resin means less weight, and the weave and finish stay consistent from one hood to the next.

FITMENT AND INSTALLATION

To install, transfer your factory hood latch, hood latch clips, and windshield washer lines to the carbon fiber hood. All hardware is included.