The OTR 11.5" x 44" Charge Air Cooler for Freightliner ensures Expertise Built In™ by meticulously cools your engine’s air after it transfers through your turbocharger and before it goes into the engine. This heavy duty charge air cooler is not only the best in its class, but it is also 100 percent leak-free. FleetPride is your First Click in Heavy Duty®.