Farquhar has won two Superbike races at this week's Southern 100
Ryan Farquhar took his tally of wins at this week's Southern 100 meeting to four by winning Thursday's 600cc race on the Isle of Man.
Dungannon rider Farquhar had already clinched two Superbike wins and a 600 success at the meeting.
William Dunlop won Thursday's 250 and 125 races after triumphing in Wednesday's 250 race.
Farquhar had to settle for second place in the main championship race on Thursday behind Guy Martin.
Conor Cummins was third in the Championship race with Michael Dunlop in fourth.