This coolant radiator expansion tank is designed for use in 911 996 series vehicles produced between 1999 and 2000.It serves as a direct replacement for OEM part numbers 99610614753, 99610614754, 99610614755, and 99610614756.Engineered to meet specifications, this component supports consistent thermal management and helps maintain proper engine operating temperature.Ideal for routine maintenance or restoration projects involving the vehicle's cooling system.