Three people including a 16-year-old girl have been arrested on suspicion of supplying more than 30 packets of Class A drugs.
The substances were seized after a car was stopped in Hanover Place, Canterbury, shortly before 3pm on Wednesday.
A 21-year-old woman and the teenager were arrested after community police officers searched the vehicle and came across the suspected drugs.
A 19-year-old man from Folkestone was also arrested on suspicion of being concerned in the supply of drugs.
They have since been released from custody pending further enquiries.
Anyone who suspects drug-dealing can report it at www.kent.police.uk/report or by calling 101.
Alternatively call the Crimestoppers on 0800 555111.