Cooler intake temperatures mean more power. It's just that simple. While the factory supercharger cooling system is adequate in stock configuration, it struggles to keep up with the multitude of popular modifications that not only deliver more power, but also increase the stress and strain on the engine. AFCO's Heat Exchaners will regain lost horsepower by more effectively cooling intake temperatures, creating a more dense intake charge versus stock. This is critical in controlling detonation in a supercharged application.
The Single Pass is great for an occasional stop on the gas, but if you are continually requiring mass amounts of power, the added cooling of the Double Pass and Fan/Shroud are your best choice.