Cooling Function Thoughtful design features replaceable carbide tips. Provides additional cooling in hard or icy snow conditions. Coil design allows reverse operation without damage. Bracket (860201503) required for MXZ 129? with quick-adjusters. Installation & Use Easily stored below running board when not in use. Not compatible with MXZ 129? with quick-adjusters. Compatibility Not compatible with 129? & 137? Sport models with SC-5M suspension. Not compatible with models equipped with SAS (Smart-Shock Semi-Active Suspension).