The Mercedes-AMG GT3 is already being fielded in numerous race series around the world, and Affalterbach has now followed it up with a new entry-level car that will slot under it, called the GT4.

Based on the flagship GT R sports car, the new turnkey racer features the same 4.0 litre twin-turbo V8 as the road-going machine, rather than the 6.2 litre naturally-aspirated unit found on the GT3. Due to regulations, outputs are pegged at up to 510 hp and over 600 Nm of torque, down from the GT R’s 585 hp and 700 Nm and on par with the GT S. Exact figures will depend on the balance of performance applied.

Drive is sent to the rear wheels through a six-speed sequential manual transmission – mounted in the rear as a transaxle, like the road car – and an adjustable limited-slip differential. The aluminium spaceframe is the same as the GT R, with carbon fibre also used in parts of the chassis and the bodywork. A lightweight composite material is used on the bonnet, front apron and front splitter.

The GT4 features several extra bits that differentiate it from the GT R – in addition to the aforementioned front splitter, there are also front canards and an adjustable rear wing. The wheels are smaller than on the GT R, measuring 18 inches; they hide competition-spec brakes with adjustable ABS, as well as all-round double wishbone suspension with dampers adjustable for rebound and compression.

Inside, there’s a roll cage made of high-strength steel, plus a FIA-homologated carbon driver safety cell with an integrated headrest, a roof hatch for emergency extrication and a fire extinguishing system. Also fitted are backlit steering wheel controls for ease of use in night driving, as well as optional air-con, a racing ECU, a new torque controller and optimised AMG traction control with 11 levels.