STILLEN designed this Heavy Duty Steering Fluid Cooler to handle driving habits ranging from casual cruising to extreme canyon running. If you are auto-crossing, doing some extreme driving, or have swapped your wheels & tires for a wider and larger diameter set, you are taxing your stock steering fluid cooler and risking the chance of boil-over or cooking the fluid.
The differences between the stock steering Fluid Cooler and the New STILLEN unit are capacity and volume. The reservoir for the STILLEN unit is larger which eliminates the chance of boil-over. The lines are also larger in diameter, allowing more volume through the steering system.