Born out of the FOX R.A.D. program, theECS2 Cooler upgrade puts UTV race-dominating technology into a package that can benefit anyone who has a FOX-equipped sport UTV and a need for speed! Racing or riding at high speed for sustained duration's heats the shocks significantly. As oil temperature climbs, viscosity decreases. Decreased viscosity means less damping force and less control.
Extreme heat can push shocks past their ideal operating zone, resulting in shock fade. The FOX ECS2 Cooler functions as a heat exchanger, reducing shock oil temperature so damping force stays more consistent.
During development, test engineers observed more than a 70°F drop in shock operating temperature in both dyno and field tests.
The cooling system can be added to most 2.5- or 3.0-inch diameter FOX UTV shocks and relies on a check valve to produce unidirectional oil flow. As the shock compresses, oil flows through the ECS2 Cooler and dumps into the reservoir. On the rebound, cooled oil flows back into the shock, maintaining optimal damping function.
Branden Sims interview: Racing the ECS2 Cooler
The new FOX ECS2 Cooler works with most FOX 2.5″ and 3.0″ UTV rear shocks. 
The new FOX ECS2 Cooler works with most FOX 2.5″ and 3.0″ UTV rear shocks. 
Factory Polaris RZR racer Branden Sims has been testing and racing with the FOX ECS2 Cooler all season. Sales and service partners include Shock Therapy and FOX Midwest. The new FOX ECS2 Cooler works with most FOX 2.5″ and 3.0″ UTV rear shocks.
FEATURES
- Unidirectional oil flow
- Impact extruded 6063-T5 aluminum alloy
- Internal and external fins for maximum cooling surface area and heat dissipation
BENEFITS
- Maintain consistent damping force
- Longer service intervals in extreme heat conditions
- Better performance for racing and riding at high speed for extended durations
COMPATIBILITY
- Existing FOX UTV shocks only
- Most FOX 2.5” and 3.0” rear shocks
Professional installation required by Shock Therapy in Phoenix, Arizona or the FOX Midwest Service Center in Baxter, Minnesota. Fitment options and pricing are based on your existing FOX shocks.