4K HD Wallpaper: Pagani Huayra
From the talented photographer - Cyrill B. - is this photography with the Pagani Huayra hypercar at San Francisco Auto Show. From his courtesy the image is shared in his Flickr portfolio under CC By license and here's optimized for use in desktop backgrounds and homescreen phones.
Widescreen Desktop / Macbook (Retina): 2880x1800 (fits on: 2560x1600, 1920x1200, 1440x900)
High Definition HD 1080p: 1920x1080 (fits on: 1600x900, 1366x768, 1280x720)
Samsung Galaxy Tab & iPad: 2048x2048 (compatible with many tablets)
HTC, Samsung Galaxy & iPhone: 1080x1920 (compatible with many phones)