Design Engineering Inc. Radiator Relief Thermal Additives

Give Your Engine A Cooldown

DEI's highly-acclaimed Radiator Relief line of additives has expanded with several thermal products designed to increase the cooling efficiency of any stock or aftermarket radiator. Reduce engine temperature up to 30 Degrees F with new anti-foam formulas using corrosion inhibitors. Today's gasoline and diesel-powered motors aren't as efficient as we'd like them to be, but DEI's Radiator Relief products can increase the cooling system efficiency of any vehicle.