Khiro has had numerous requests to make a Combo Bushing Set. This unique setup consists of: using a Khiro Small or Large Insert Bushing for the Top Bushing and using a Khiro Barrel Bushing for the Bottom Bushing. This KhiroCombo Bushing Setup will give you more stability and offers you a stiffer, quicker rebound. This set up allows you to do away with the top "cup" washer and gives you more Kingpin thread to use. Khiro is always on the cutting edge in urethane technology and gives you the best choice in urethane bush.