2018 Western Star 4900EX. 2021 Western Star 4900EX. 2019 Western Star 4900EX. 2020 Western Star 4900EX. Part Type: A/C Expansion Valve. Block Type Expansion Valve w/o Solenoid. Expansion Valve. Ensure that this part fits your vehicle by entering your vehicle's Year, Make, Model, Trim, and Engine in the Compatibility Table.
