Post #5 - Kitkat

A bit outdated, but still useful since not everyone updates their Android:

http://xdawhizz.com/root/galaxy-s4-on-kitkat

http://xdawhizz.com/root/galaxy-s4-4-4-4-kitkat

http://xdawhizz.com/root/galaxy-s4-4-4-2-kitkat