Gagasi FM (previously P4 99.5 FM or P4 Radio Durban) is a radio station broadcasting in Durban and surrounding areas in KwaZulu Natal, South Africa, specialising in R&B, Afro pop, hip hop, house and kwaito. it had a listenership of approximately 10 million. The station launched on 13 March 2006. It claims to be the only English and Zulu radio station in the country.
The station had 1 million listeners during its first year of operation.