Testing of the drugs had identified them as fantasy and methamphetamines.
The man, 36, and woman, 38, both of Tailem Bend, were arrested on Thursday after they were stopped in their vehicle near Port Wakefield Rd at Cavan.
Police will allege the man is an associate of the Mongols outlaw motorcycle gang.
The pair were charged with two counts of trafficking in controlled drugs and were refused bail to appear in the Adelaide Magistrates Court.