Ajay Marrot Racing Designs: 3D Printed Tri-Damper Conversion Kit. Designed to Eliminate Center and Side Damper disk, Side Damper Post and Springs on the Nexx Racing NX-300 Specter Racing Chassis to: Side Spring and Damper Tube Dampening. Testing has shown improved response, faster lap times and more consistent performance. Requires: GL-Racing Side Damper set, Pistons, Collars and Springs. *Not For Sale