45 degree silicon couplers with a sturdy wall. Silicone couplers can endure higher temperatures than rubber. Silicone couplers can be used for air and coolant piping in the engine bay. The threaded wall of the couplers make them ideal for high pressure applications.As a material, silicone can be used to pipe air, water and coolant. Small amounts of gasoline and oil are also ok, but for gasoline or oil piping silicone is not the right material as long term exposure to gasoline or oil softens silicone.
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