Toyota’s GR GT halo car project looks set to expand, with plans for an open-topped version firming up, and moves to create an even more focused model underway.

For now, Toyota has revealed the GR GT as a fixed-roof coupe. Its motorsport ties are strong, essentially appearing as a road-ready version of the GR GT3 race car to meet homologation requirements.

Motor1 reports that Toyota has plans to expand the GR GT’s range, although it appears any future versions will retain the same 478kW/850Nm 4.0-litre twin-turbo V8 hybrid powertrain and rear-wheel drive.

The range-topper is set to be a more finely honed, rather than radically overhauled, model.

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Enhancements to the aero package are expected, borrowing from the GT3 version of the car, including a larger front splitter and towering swan-neck rear wing. Vented front guards and changes to the rear diffuser may also make the cut.

The final product isn’t expected to use race-prepped exterior parts from the GT3 car, but will echo the styling of the race version, and find a midway point between the regular GR GT and the GR GT3.

The Track Package name has been mooted, rather than Toyota’s GRMN ‘’Meister of Nürburging’ branding applied to other special edition GR cars. Despite this, suspension, steering, braking, or chassis tweaks may be included to further differentiate the Track Package from the regular GR GT.

Buyers less concerned with ultimate performance and more attuned to sensory immersion may be offered an open-roof version of the GR GT.

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A report from Japan’s Magazine X and shared by Car Sensor suggests that the structural demands of the GR GT’s all-aluminium frame will see a targa-style removable roof panel used, rather than a fully-folding top.

Other details remain unknown, including any impact on the coupe’s 1750kg estimated kerb weight.

Regardless of the version, the GR GT is set to be a strictly limited model globally, with production capped at 500 units. Lexus will also launch an electric LFA successor based on the GR GT’s platform, with powertrain details and production numbers yet to be revealed.