Nissan Silvia S13/180sx Radiator Overflow TankNISSAN S13 RADIATOR OVERFLOW TANK Replace that old plastic weathered coolant overflow tank which keeps cracking and leaking coolant all over the place with our full aluminum overflow tank! There is a side mounted fluid level indicator which allows you to check the tank level easily. This tank comes with the radiator cap and screw in drain plug, allow the tank to be easily emptied and maintained. TIG welded Direct bolt on replacement for original