You can download McLaren 570s – 650s from here : https://play.google.com/store/apps/details?id=lamborghini.wallpapers.CarWallpapers.CarSounds There are more than 30 thousands car wallpapers and it is the best android car wallpaper source.
Some popular background categories in the app like
Muscle car backgrounds
Aston Martin backgrounds
Rolls Royce backgrounds