Western Cape Provincial Traffic Services have arrested two men and confiscated abalone worth R5.68 million.
The bust was made at a strategically located roadblock over the weekend.
Authorities say the suspects, aged 44 and 47, were arrested after they were stopped by traffic officers who had suspicions about the contents of the vehicle.
On close inspection, the officers found 11-thousand 650 abalone and arrested the suspects.
The men were handed over to the police and are facing charges of being in possession of abalone in excess of legal limits.