911 Turbo (75-89) 924 (76-80) 928 (78-83) 964 Turbo (91-94) Auxiliary air regulator. This is an exchangepart which requires sending your old part back before we ship out a new one.
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carburetor, injection, fuel pump
928 (87-95), 964 (89-94), 968 (92-95), 944 (85-91) Ventilation, Vent valve