32 mm (1.25 inch) inner diameter, for welding onto the radiator filler neck with a 1.1 bar cap, aluminum filler neck for most cars, adapter

Specification: Item Type: Weld-on Radiator Filler Neck Material: Aluminum Inner Diameter of Filler Neck: Approx. 32mm/1.25in Function: The main function of the car radiator filler neck is to facilitate coolant refilling to maintain the engine's normal operating temperature. During prolonged use and while driving, the radiator can cause the engine to overheat due to a lack of coolant. In severe cases, this can damage the radiator and cause the engine to overheat, leading to further malfunctions and compromising driving safety. Therefore, the presence of the radiator filler neck allows for easy coolant addition, timely top-up and adjustment of the vehicle's cooling system, and protection of normal engine operation. Application: Fits most cars of the correct size. Package List: 1 x Filler Neck with Cap Note: It is highly recommended that it be installed and fitted by professional mechanics. 1. [DURABLE AND RELIABLE] Made of high-quality aluminum, the welded radiator filler neck offers superior durability and reliability, ensuring long-term stability. 2. [WIDE APPLICATION] With a diameter of 32 mm / 1.25 inches, the aluminum radiator filler neck with weld-on cap is suitable for most automotive cooling system modifications. 3. [IMPROVE ENGINE PERFORMANCE] By easily adjusting and topping up coolant, the welded radiator filler neck helps maintain optimal engine temperature, ensuring smooth and efficient operation. 4. [EASY COOLANT REPLACEMENT] The welded radiator filler neck allows for easy coolant refilling, ensuring quick and efficient maintenance of your car's engine cooling system. 5. [AVOID DAMAGE CAUSED BY INSUFFICIENT COOLANT] Insufficient coolant can cause the engine to overheat and potentially damage the radiator. The welded radiator filler neck helps prevent such damage by making it easier to fill and maintain the coolant.