When it comes to styling, the new BMW 4 Series is one of the most controversial new cars on the block thanks to its gigantic grille. Unsurprisingly, it didn't take long for aftermarket tuners to try and improve the styling. AC Schnitzer, one of the most prolific BMW aftermarket tuners, has already worked its magic on the 4 Series Coupe and M4, and now the German aftermarket tuner is focusing on the new 4 Series Convertible with the launch of a new tuning package that gives the topless 4 Series a sporty new suit and a power bump.

Visually, AC Schnitzer's take on the 4 Series Convertible is fitted with new aerodynamic components including a front splitter that increases downforce at the front axle by 35 kg at 200 mph.

New front spoiler elements and side skirts also help make the 4 Series Convertible look more athletic. These enhancements are subtle, but they help divert attention away from the distracting grille. The modified 4 Series Convertible also sits on 20-inch AC4 Flow Forming wheels wrapped in 235/35 R 20 tires at the front and 265/30 R 20 on the rear axle. Alternatively, AC1 alloy wheels in BiColor or Anthracite are available in 19-inch or 20-inch sizes. A sports suspension system also lowers the car by 0.5-0.9 inches.

The upgrades aren't only cosmetic, either, as AC Schnitzer has tinkered under the hood to extract more power from BMW's 2.0-liter turbo-four and 3.0-liter turbocharged inline-six engines.

As standard, the M440i produces 382 hp, but AC Schnitzer's performance upgrades increase the output to 420 hp, closing the performance gap between the M440i and the base-model M4. The tuner can also crank up the 420i, which is not sold in the US, to 224 hp. It sounds more aggressive too thanks to a stainless-steel exhaust system with tailpipes trimmed in carbon, chrome, or black.

Inside, the interior is upgraded with aluminium accessories including new paddle shifters, pedals, an iDrive controller cover, and a key holder.