Porsche Warm Up Regulator Repair Kit For Porsche 911 (1974-1990), 924 (1978-1986), 928 (1977-1982) Models. Fits 1974-1990 Porsche 911 ;1978-1986 Porsche 924 ;1977-1982 Porsche 928. A rough running engine or poor starting behavior are a common sign of worn seals and components.
