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2025 Toyota Supra GRMN spotted, gets M3/M4 ‘S58’ engine? (video)

Toyota has been spotted testing what is believed to be the long-rumoured GRMN high-performance version of the GR Supra, in and around the Nurburgring in Germany.

The latest Supra is already a ‘GR’ product, like the GR86, GR Yaris and GR Corolla. However, there is a badge that sits above these; GRMN. This basically stands for Gazoo Racing Masters of the Nurburgring, and so far it has only been applied to the previous-generation Yaris.

2025 Toyota Supra GRMN prototype at Nurburgring

Reports and rumours have been circulating for quite some time now that Toyota is looking to revive the badge with a high-performance version of the Supra. Experts predict it could come with BMW M’s S58 3.0-litre twin-turbo inline-six engine.

This is different to the regular Supra’s B58 BMW-based engine. According to a Car and Driver report, BMW might only provide access to the lower state of tune of that engine, like what is seen in the latest M2. That produces 338kW, while the M3 and M4 Competition develop a more serious 375kW.

Another option could be the 353kW tune that’s applied in the regular non-Competition versions of the M3 and M4. There’s also a chance the BMW-Toyota relationship doesn’t extend to BMW M at all, meaning the GRMN could be left with a tuned version of the B58. It currently produces 285kW.

2025 Toyota Supra GRMN prototype at Nurburgring

Revealed in the spy video below, provided by CarSpyMedia, the prototype features an impressive extended rear wing mounted on struts. Some camouflage/colourful wrap conceals the front end which also looks to include a more aggressive front apron and intake system.

Interestingly, the prototype features a manual transmission – you can hear the driver shifting gears and engaging a clutch. Toyota introduced a manual transmission option with the regular Supra as part of the 2022-2023 model update, so the idea of a manual isn’t new but still very enticing nonetheless.

The brake discs on the front appear to be larger and slotted/cross-drilled as well, although the red calipers look similar to those featured on the current GTS model (pictured above). We suspect they will be uprated in any case. We should also expect some suspension upgrades and perhaps changes to the infotainment system and drive modes.

Other changes expected? Michelin Pilot Cup 2 tyres for extra grip in the corners, and bespoke seats inside to provide additional bolstering and visual impact. We should know more soon, as a full debut is expected in the next six months or so.

Brett Davis

Brett started out as a motor mechanic, but eventually became frustrated working on cars that weren't his. He then earned a degree in journalism and scored a job at Top Gear Australia back in 2008, and then worked at Zoom/Extreme Performance magazines, CarAdvice, and started PerformanceDrive/PDriveTV in 2011 with Josh Bennis, and ran it for 12 years. He's now the owner and managing editor here at Driving Enthusiast.

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