BMW 6-Series GranCoupe by Hartge

Hartge has developed an aftermarket program for the BMW 6-Series GranCoupe 640i and 640d models. In its standard configuration, the inline-six 3.0-liter turbocharged engine of the 640i produces 320 HP (235 kW) and 450 Nm (332 lb-ft), but with Hartge's modifications it outputs 367 HP (270 kW) at 5,900 rpm and 520 Nm (383 lb-ft) reached at 2,950 rpm.

The 640d makes use of a 3.0-liter diesel generating 313 HP (230 kW) and 630 Nm (465 lb-ft). After making the necessary tweaks, Hartge was able to raise its output to 362 HP (266 kW) at 4,400 rpm and 730 Nm (538 lb-ft) at 1,800 rpm.

The additional power was possible by increasing the airflow by using an in-house stainless steel exhaust system with Hartge's stainless steel middle and rear silencers with dual 80mm round tailpipes.

Aside from the power boost, the 640i can be fitted with sports springs lowering the four-door coupe by 25 mm and 20 mm (front/rear). The 640d can also be lowered by 30 mm and 25 mm, respectively. The exterior packs the tuner's emblem on the hood and boot lid, while inside the car receives bespoke floor mats, aluminum emblem on the steering wheel and aluminum pedals. Various wheels are available in different styles and sizes.

Source: Hartge

BMW 1-Series by Hartge

Hartge has introduced a new tuning program for the BMW 1-Series (F20). On the styling front, the model can be outfitted with lowering springs (which reduce the ride height by 30mm) and 19-inch alloy wheels. The cabin can also be equipped with aluminum pedals, velour floor mats and Hartge badging. For added performance, a revised ECU enables the 116d to produce 142 PS (104 kW / 140 hp) and 310 Nm (229 lb-ft) of torque. Likewise, the 118d can be tuned to develop 174 PS (128 kW / 172 hp) and 380 Nm (280 lb-ft) of torque. Lastly, the optimized ECU for the 120d allows the engine to produce 218 PS (160 kW / 215 hp) and 450 Nm (332 lb-ft) of torque.

Hartge H35d based on BMW 535d

German tuner Hartge (which, like Alpina, is officially certified as a manufacturer in Germany) has turned the 300 PS (220 kW / 296 hp) BMW 535d (F10) into the Hartge H35d with 354 PS (260 kW / 349 hp) and 700 Nm (516 lb-ft) of torque.

Hartge also adds its own sport springs which lower the suspension on the car by 30 mm and fits its with 21-inch, ten-spoke wheels.

The stainless-steel rear silencer with 80 mm dual tailpipes helps provide this oil-burning powerhouse with just the right muted diesel sound.

The outside gets a few delicate touches such as the carbon casings for the side mirrors. For the interior are several other light trims which include the aluminum pedals and stainless-steel door sills.