I'll try to grab a pic soon, but it's literally just a threaded shaft with a nut on it hooked to the back of the brake pedal arm. If you loosen that nut it allows you to spin the shaft and that will bring the pedal in and out. Then you tighten that nut back up to lock it at that level. It really...
On my xl I hated the brake pedal position. Turns out when I crawled up under there it had an adjustment nut that was pretty much adjusted all the way out. After I adjusted the pedal down a bit it was way more comfortable. If you take a look down there you should be able to see what I am talking...
I kind of like this kit as it seems to prioritize the spring preload over just adding a spacer on top of the whole shock. I would imagine that adding preload to the spring has a less negative effect on travel because the shock itself is not moving as much. It's basically how the fox and Bilstein...
I've seen threads on rough idle that claim to have been fixed by doing the procedure described at this web page
https://www.morepowertuning.com/how-to-idle-relearn