This a super simple, cheap, and nice looking mod. just a basic cnc gas cap. 

It doesnt fit directly out of the box and to make it fit i had to switch the OEM gas caps rubber ring gasket onto this gas cap.  I also have heard of someone having to drill a small hole in it to relieve pressure but i havent had an issue with it. I noticed if you turn it to far itll bend the tabs a bit that hold it to the tank. This isnt a huge deal as you just have to push them back with your hand slightly and its fine but it is a little annoying until you get used to not cranking it down super hard.