If we want to upgrade our current work to the new technology but don't want to spend a fortune on the new fork, the RockShox Charger 3. 1 Damper Upgrade Kit has our back. This kit upgrades our existing RockShox fork with a Charger 3. 0 damper into a 3. 1 damper. It is compatible with the RockShox Boxxer 2024+, Zeb 2021+, and the Lyrik and Pike 2023+. The RockShox Charger 3. 1 Damper Upgrade Kit includes a piston assembly, tuning shims, and a Head Valve Tool.