Fabtech 21-24 Bronco Rear Dirt Logic 2.5 Reservoir CoiloversBrand Fabtech Part Number FTS22356 Category Suspension Coilovers Condition Brand New Original Manufacturer Packaging Derived from our desert racing circuit the Dirt Logic 2. 5 is an exceptional performance shock that has been developed for a variety of coilover applications. The Dirt Logic 2. 5 will provide incredible dampening capacity for aggressive offroad driving.