Kammback

A Kammback—also known as a Kamm tail or K-tail—is an automotive styling feature wherein the rear of the car slopes downwards before being abruptly cut off with a vertical or near-vertical surface. A Kammback reduces aerodynamic drag, thus improving efficiency and reducing fuel consumption,^[1] while maintaining a practical shape for a vehicle.

The Kammback is named after German aerodynamicist Wunibald Kamm for his work developing the design in the 1930s.

Some vehicles incorporate the kammback design based on aerodynamic principles, while some use a cut-off tail as a design or marketing feature.