90 degree silicone elbows are dual-purpose designed for coolant and charge air connector systems, these silicone elbows are extreme duty cycle tested for hostile engine environments. They're constructed with low dilation design to prevent expansion.Associated Clamp 2582-0056 or 2584-0412 (not included) Features- Extreme Temperature Resistance;Extreme Duty Cycle Tested for Hostile Engine Environments;Low Dilation Design ;Prevents Expansion;Engineered for Coolant and Charge Air Connector Systems; Temperature Range- (-65F) to 500F; Built to Withstand- Cool Temperature, Hot Temperature, Oil Splash Resistance, Ozone Resistant, Direct Sunlight