- Lightweight Track-Focused M4 GTS - Black Sapphire Metallic Paint - 1 of 30 UK Cars - 1 of 700 Worldwide - UK Supplied The GTS is all about weight saving and maximum performance, much like the M4 DTM. A large carbon fibre weave bonnet shaves 3kg off of the originals weight and lightweight composite doorcards are just some of the measures used to reduce weight. With a carbon fibre roof, lightweight carbon fibre seats with the rear bench eliminated the saving amounts to a generous 30kg. The 3-way adjustable suspension setup that is found in the M4 DTM is also present on the GTS and improves the handling dynamic over the standard M4. Power is up to 493bhp, 68bhp more than the standard M4. This is achieved with help from a water injection system that lowers the temperature of the charge air and condenses it. This allows the turbos to run higher boost pressures which enables the power gain. Just as effortlessly as the M4 GTS can get up to speed, it can also scrub the speed off well thanks to the standard M Carbon Ceramic Brakes. This rare one of 700 car is a raw but refined driving experience that intensely challenges its drivers to push the limits.