Coolant Overflow Tank Kit Leakage Prevention Aluminum Radiator Overflow Expansion Tank Kit for 240SX S13 ALL Models Replacement aluminum overflow tank designed for use with 240SX S13 models.This expansion tank connects to the radiator system to capture excess coolant and prevent leakage during engine temperature fluctuations.Constructed from aluminum for and resistance to corrosion.Direct fit design replaces the factory unit without modification.Helps maintain proper cooling system pressure and fluid levels.Includes all necessary components for installation as a complete kit.Compatible with all model variants of the 240SX S13.