Combo Kits are the best valving choice as they include both a Compression as well as a Rebound / Mid-replacement valve Gold replacement valve Kits.. Some people choose to do just the Compression Gold replacement valve Kit however the Rebound Gold replacement valve works very closely with the Compression to create the optimum damping curve.. The Combo Kit is discounted over buying both kits separately. On SFF Forks it is the only choice..This item fits the following vehicle applications:compatible with Kawasaki KX250 2019-2021compatible with Kawasaki KX250F 2013-2018compatible with Suzuki RM-Z250 2013-2015compatible with Suzuki RM-Z450 2013-2015