The drugs had an estimated street value of £540,000.
Border Force officers stopped a Bularian-registered Audi A6 at Dover's Eastern Docks on 17 August 2013. After questioning Hristo Petrov officers searched the vehicle and found five brown taped packages in the battery compartment. A field test on the contents of the packets re-acted positively to heroin.
Petrov, 42, was arrested and the investigation passed to the National Crime Agency.
He pleaded guilty at a hearing at Canterbury Crown court on 2 December 2013 and received six years imprisonment there on Thursday (20 March 2014).
