BMW M4 GTS to feature water injection system, bow in August

Previewed by the MotoGP safety car, the GT trim is expected to debut at Pebble Beach.

BMW is reportedly preparing to introduce the M4 GTS at the Pebble Beach Concours d'Elegance.

The company quietly previewed an M4 MotoGP safety car this week in Geneva, featuring a water injection system that cools the intake charge and helps prevent knock. Engine tuning can then be revised to achieve more power and torque via higher boost pressure and more aggressive timing.

Water injection is already popular in track cars and has been offered in a few production vehicles. BMW will soon use the technology to help squeeze more power out of the M4 GTS, unnamed company insiders told Car and Driver.

Water is stored in a 1.3-gallon tank in the safety car's trunk, presumably mixed with alcohol to prevent freezing. The system is said to be capable of still running the engine if the water is exhausted.

Consistent with the E92 M3 GTS, the F82 build is expected to be stripped down and outfitted with plenty of carbon-fiber components to further reduce curb weight. The track-focused M4 will also likely receive upgraded suspension and new tires to help reduce lap times.

If the report is accurate, the concept M4 GTS will be unveiled in August.

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