And for good reason, as it is the successor of possibly the best BMW tuning platform out there.

So when AC Schnitzer came out with their product for the 4 Series convertible, there was little wonder they managed to do it in such a short time. As far as visuals go, not much was done to it, as AC Schnitzer just offers a few choices of wheels, chrome exhaust tips and various other knick knacks.

Performance wise, the tuner did its due diligence, as every drive option got a power upgrade. Thus, the 420d gets a power bump from 181 Hp to 215 Hp, while the 420i goes from 181 Hp to 241 Hp. Moving up the range, we get the 428i, which has a power increase from 241 Hp to 289 Hp. The 435i goes from 302 Hp to 355 Hp, while the range topping 435d goes from 308 Hp to 355 Hp.

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