World’s Best Oil Cooler

Join thousands of happy customers with UltraCool.

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Get A Peace Of Mind With UltraCool This New Year.

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Welcome to a new generation.

See the UltraCool Reefer® Oil Cooler in action.

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Harley® Oil Cooler & Motorcycle Oil Cooler Systems

Welcome to a new generation of oil cooling systems. The latest innovation for your Harley-Davidson® and V-twin motorcycles. Whether you’re traveling the back roads of America, stuck in a traffic jam, or just cruising the city streets, oil temperature is a constant threat to the rider and engine safety. We help this issue by keeping your engine running cooler while adding comfort and safety to your ride. Welcome to the UltraCool Reefer® Oil Cooling System.

As seen on

UltraCool as seen on Custom Chrome, Dennis Kirk and JP Cycles

Easy Harley® Oil Cooler video installation.

Installation is a breeze! Just take a look at the UltraCool installation videos with Larry and Ligia in our series of 5 minute quick install videos. They give us a great introduction and show us how to install your new UltraCool Oil Cooling System in HD. Check it out!


Watch more here

The best performance.

The UltraCool Reefer® is the perfect balance of power and performance, taking oil cooling systems to a whole new level. Advanced engineering that adapts to the way you ride. And a new generation of quality components that revolutionize the industry. The UltraCool Reefer® is simply the best oil cooling system we’ve ever made.


See why
UltraCool Reefer Installed
UltraCool Reefer Installed

Raving Harley® fans, fully approved!

Testing is constant process here at UltraCool. And no one helps us better than our own customers. It helps us in both product reliability and product performance areas. The Reefer helps to keep the engine’s oil at a optimum temperature. See what a lot of our fans have to say!


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Get your UltraCool Reefer®

The UltraCool Reefer® Oil Cooling System, made of quality components, with quick installation, and a nice warranty so you know you’re in good hands.
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