If you have ever stumbled across this page,
http://sidewindersprockets.com/
Their advertising looks too good to be true, and apparently rightfully so...
https://www.facebook.com/pages/Sidewinder-Sprockets-Failures/715008641920953?ref=aymt_homepage_panel
(Edit) I'm out a decent chunk of change because of them. Their master clips fail all the time, smart 2 chains spit rollers after a few thousand miles and sprockets are made of butter. Huge waste of money.