Adem Arpaci leaves the County Court with his lawyer during the first trial last year. Credit:AAP

A hoon driver has been found guilty of causing the deaths of two teenagers in a fiery, high-speed crash off the EJ Whitten Bridge.

It took two trials for a jury to reach a verdict in the case against Adem Arpaci. After a hung jury in the first trial in October last year, the jury in the new trial found on Friday that the 23-year-old was guilty of culpable driving causing the deaths of 19-year-old Harley Churchill and his girlfriend, 18-year-old Ivana Clonaridis.

Ivana Clonaridis died aged 18.

Mr Churchill was driving at break-neck speeds, but prosecutor Kevin Doyle successfully argued he wouldn't have done so without Mr Arpaci, who baited the couple into a drag race along the Ring Road in Melbourne's west.