AC Schnitzer reveals more powerful BMW M4

German tuner AC Schnitzer has taken the G8X BMW M4 to a new level with a variety of upgrades for both the G83 M4 Convertible and the G82 Coupes.

AC Schnitzer is still developing engine hardware upgrades for BMW's S58 twin-turbocharged straight-six, however, it has managed to release some additional power.

The most powerful ECU tune by AC Schnitzer increases output to 450kW/750Nm over the standard M4 Competition, and a lesser 435kW tune is also available. The new-found power brings a drop to the standard 0-100km/h time of 3.9 seconds and a bump to a new top speed of 300km/h.

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Outside, the appearance brings aerodynamic gains. The front splitter brings a claimed 40 kilogram increase in downforce at 200 km/h, and the rear wing boosts downforce by up to 70kg for the coupe. There are also bonnet inserts, front canards, side skirts, and a smaller rear spoiler. A redesigned carbon fibre diffuser is available only for convertibles.

The wheels have been swapped for 20-inch i-house-designed AC3 or AC1 lightweight alloys. These are available in gloss black, and come in a variety of diamond-cut finishes, wrapped with wider 285 millimetre front and wide 295mm rear rubber.

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Underneath the metal, AC Schnitzer offers its new RS coilover suspension setup, which improves high-speed stability and drops the ride height up to 40mm rear and front. A spring kit, which can reduce ride height by as much as 20mm, is also on the list of options.

Inside, buyers can choose a retrimmed steering column in perforated Nappa leather or black Alcantara, featuring grey contrasting stitching and a 12 o'clock marker. Additional options include aluminium pedals and gearshift paddles behind the wheel.