Beaker...I didn't opt for their shock but I did install the progressive spring that comes with your shock. As far as I'm concerned it transformed the ass end of my 16 1000F. I tip the scales at 210 lbs. and noticed a big improvement on the street over potholes and the small jarring bumps. Much smoother and I followed their settings and it's working great. Very satisfied. Just put on a new 190/55 rear boot and looking forward to get out and test. Enjoy!!