Does Cooling you fuel make Power - Yes

[Pinkfluffybunnys]

I also remember doing a lot of research on this topic and you will be amazed at how many big name use fuel coolers like: Ferrari, Merc, BMW, all Lemans cars , all DTM touring cars , all Rally cars , Most use Air/fuel coolers to drop the temperatures just before the rail but I never had a dyno chart to show any gains, Now the gain will be less because you will be using air and the test was done with Ice but there will be
Gains

How It Works:
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Once inside the engine bay, fuel lines and components soak heat emitted by the engine and exhaust components, raising fuel temperatures and decreasing fuel density. Cooling fuel before it enters the final stages of the fuel system increases power by making fuel denser and lowers cylinder temperatures prior to combustion. The Cool Can is designed to fit in a car's fuel feed line-preferably just before the engine-and once filled with a cold substance of choice, cools and condenses fuel

How It Was Tested:
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The cooling chamber of the Cool Can is designed to house a frozen 12-ounce beverage can and a little water, so that's how we tested it. Heading back to MD Automotive with the product installed inline between our DC2's fuel filter and rail, dyno runs were conducted first with the Cool Can empty, then later with it filled with the predetermined ice/water mix.
Notes: Our naturally aspirated B18B doesn't use a lot of fuel; engines that use more fuel and make more power-per-liter will register proportionately larger gains, and could possibly gain even more power if the increased fuel mass and cooler temperatures allow more aggressive tuning. Alas...testing for another day.

[Enzio]

This is an old trick.

I've heard a lot about the old mini race cars where they used old coffee tins. They Make the copper fuel line very long and then wind it up like a coil from the bottom of the tin. With the tin filled with dry ice and the whole contraption as close to the firewall/carb as possible.

The modern interpretation is obviously like the CryO2 cooling kit, but the oldskool way is obviously a lot cheaper