Purchase Kuehl 928 AC Receiver Driers in all 3 styles direct from Griffiths.
Griffiths offers Porsche 928 AC Receiver Driers that are R12 and R134a compatible for model years 1978-1995. Driers should be changed when you changing refrigerant types, oil types, the drier is over 4 years old, when their are signs of excessive moisture in the system (expansion valve sticking), signs of contamination such as debris or gelled oil, or you have had a compressor break down or lock up.
Griffiths stocks all 3 styles of driers for your 928. Kuehl Receiver Driers are a direct drop-in replacement for the stock OEM drier.
Kuehl driers uses XH9 type desiccant which is compatible with R134a and R12 refrigerants. Includes new o-rings.