Autotecknic 2014-up Bmw 4 Series (f32/f33/f36) Black Sapphire Painted Reflectors on 2040-parts.com

2015 BMW M4 Convertible debuts: drop-top fun priced from $73,425

The 2015 BMW M4 Convertible made its official debut at the New York auto show yesterday. While the details of the high-octane hardtop didn't exactly catch us off-guard (see our full breakdown here), we now know how much it'll cost to feel the wind in your hair as you launch from 0-60 mph in 4.4 seconds: $73,425, to start. Complete pricing will be available closer to the M4 Convertible's sale date, which is “late summer” 2014, according to BMW.

Russo and Steele offers one-of-a-kind 2013 SRT Viper for charity

Russo and Steele will feature a 2013 SRT Viper GTS at its January auction in Scottsdale, Ariz., with proceeds going to the Sons of Italy foundation (SIF). The auction house says the car was built specifically for the foundation. It will join some 700 sports and muscle cars at the auction, which spans Jan.

Peugeot teases Onyx supercar concept

Peugeot has teased a supercar concept dubbed the Onyx ahead of its world debut at this month's Paris motor show. The Onyx will be further developing the supercar concepts that we've seen the automaker unveil in the past – such as the SR1 convertible and the EX1 electric racer – and is likely to indicate Peugeot's future design language as well as that of the RCZ's successor. From the teaser images we can see that the Onyx has the classic supercar wedge shape with a cab-forward design and a rear spoiler that rises at high speeds.