Parts Geek - For 2000 Lexus SC400 Radiator Cap API 64387FH 4.0L V8. 2000 Lexus SC400 4.0L V8. Notes: Radiator Cap -- Standard; 16 lb; Micro Cap. Ensure Proper FitTo confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in the Compatibility Table.