Craig Jones, 43, was sentenced at the High Court in Glasgow yesterday and judge Lord Doherty told him if he had not pleaded guilty he would have been given 14 years.
Jones admitted being concerned in the supply of cocaine between April and December 2012 and in the supply of cannabis resin between May and October 2012.
During the police operation that snared Jones, officers seized drugs with a street value of more than £8million.
Detective Inspector Graeme Lindsay, senior investigating officer in the inquiry, said Jones profited from the "untold misery his drug distribution network caused to communities".
He said: "I am satisfied with the conviction and sentencing, which comes as a result of a long term investigation into Jones and his organised criminal network."
The court had heard that the car dealer, from Leeds, recruited dealers and couriers to package and distribute the drugs throughout Scotland.
He had no contact with the drugs, but was caught because of his extensive telephone contact with those who did.
His lawyer told the court he had served two previous jail terms for drugs offences.
He said Jones had received 40 months in jail for his part in a previous drug dealing operation, but when he got out he was told by crime bosses he had to work off the debt they said he owed.
Two co-accused, Steven Stewart, 40, of Harthill, Lanarkshire, and James Farquhar, 47, of Fauldhouse, West Lothian, admitted being concerned in the supply of cannabis resin on October 9, 2012.
Sentence was deferred on them until next month.