• The latest Supra GRMN prototype sported a new vented hood and a redesigned rear wing for better downforce.
  • Speculation swirls around the engine, with rumors suggesting either the mighty BMW M4 CSL’s powerplant or the slightly less potent M2’s engine.
  • Toyota remains tight-lipped about its debut, but the GRMN Supra is expected to launch within the next year.

It’s been a few months since the high-performance version of the Toyota Supra was last spotted testing. During this time, the team developing the flagship GRMN edition has incorporated several new racing-inspired features into the sports car. Let’s take a closer look at them.

Our spy photographers have captured the 2025 Toyota Supra GRMN undergoing testing on public roads and at the Nürburgring. Interestingly, as the launch date approaches, the vehicle appears to be increasingly wrapped in camouflage. However, despite these efforts at concealment, it’s clear that the sports car will feature a new hood, complete with a prominent hood scoop positioned in the middle.

If we were putting bets down, we’d also wager that Toyota has taken steps to lighten the big hood, and may have constructed it out of carbon fiber. If so, that wouldn’t be the only race-ready component here, as the rear wing has changed since the last time we saw it.

Read: 2025 Toyota Supra GRMN Is Coming To Kick The Nissan Z Nismo Into Oblivion

Back in October, when we last saw the car testing, it appeared to have the same arcing rear wing as the GR Supra 45th Anniversary Edition model. Now, the wing has flattened out, and it has swan neck brackets that hold onto the top of the wing, rather than supporting it from the bottom. That’s how most racecars now hold their rear wings, as it helps them generate more downforce.

Elsewhere, the car is much the same as the last time we spotted it. Big wheels shod in sticky Michelin rubber will help the GRMN Supra corner, while massive brakes will help it slow down. Up front, the coupe has a variety of air management systems, including an aggressive chin spoiler, and canards directing the air around the side of the vehicle.

Huge air intakes will help feed the BMW-sourced straight-six engine that we anticipate will provide drivers with more power than the standard twin-turbo GR Supra. However, the question of how much more remains to be answered. Rumors have indicated that it might get the same twin-turbo 3.0-liter engine as the BMW M4 CSL, which produces 543 hp (405 kW / 551 PS) and 479 lb-ft (649 Nm) of torque.

Could it get the BMW M2’s Inline-Six?

However, it’s unclear how willing BMW would be to lend that engine to a car that will compete against its vehicles. Our own Chris Chilton argued convincingly that the German automaker might prefer to give Toyota the 453 hp (338 kW / 460 PS) engine from the M2.

He reasoned that the standard 3.0-liter GR Supra already uses the M240i’s 382 hp (285 kW / 387 PS) engine, and that the M2 engine’s 71 hp (53 kW / 72 PS) bump would be a significant enough improvement for the car. It would also be more power than the Supra GRMN’s closest competitor, the Nissan Z NISMO (which makes 420 hp / 313 kW / 426 PS) can manage.

Unfortunately, we’ll have to wait until the 2025 Toyota Supra GRMN launches before we find out for sure.

Credit: Baldauf