AACHEN, Germany — AC Schnitzer habitually tweaks and tricks out Bimmers of all sizes and stripes. In the case of the already potent M3 Cabrio, a cosmetic treatment and a few underbody hardware adjustments seemed like a more appropriate way to go, at least initially.

Schnitzer's ACS3 Cabriolet boasts a specially tuned sport suspension, eight-pot performance brakes and the company's Type V alloy rims in sizes up to 20 inches.

A body kit includes a chrome grille insert, a carbon-fiber front skirt and lip spoiler, side skirts and rear diffuser, plus hood vents and chrome exhaust pipes. The cockpit is trimmed in aluminum and carbon-fiber accents.