I personally run 22mm on the front and 20mm on the back, which is what Mann Engineering has recommended. I didn't upgrade the endlinks as Gary from Mann has said that he hasn't seen a need for them and the stock ones are holding up very well. I think the support braces that come with the adjustable rear bars help a lot. I love the setup and I think it handles great with this setup. I have several other suspension mods that have helped but I know the front and rear bars have helped with the handling tremendously.