David McCullough extended his Dawson WAM Northern Irish FF1600 championship lead with two wins at Kirkistown.
His brother Ivor set the pace in qualifying, with Will Herron also slipping in ahead on pace.
They each had differing fortunes in race one, with David driving past his brother and title rival to take victory, Ivor slipping behind third title contender Alan Davidson to the bottom spot of the podium, and Herron finishing his race a lap early.
This resulted in Trevor Delaney finishing fourth on his championship return, and Andrew Blair completing the top five.
David McCullough was successful again in race two, this time beating brother Ivan by a scant 0.061 seconds. Davidson was less than a second behind that battle in third, while half a minute split the podium trio from the rest of the grid.
The two podiums lifts Ivor McCullough up to fourth in the standings, but it’s not enough to keep him in title contention having missed the opening rounds of the season.
Blair beat teenager Cameron Fenton in the distant battle for fourth behind, with an even greater gap to sixth-placed Henry Campbell.
|1||David McCullough||Van Diemen||16 laps|
|3||Ivor McCullough||Van Diemen||+4.062|
|4||Trevor Delaney||Van Diemen||+21.881|
|8||Allan McBurney||Van Diemen||+40.791|
|9||Will Herron||Van Diemen||+1 lap|
|Pole: I McCullough, 1:01.204 Fastest lap: Herron, 1:01.432|
|1||D McCullough||Van Diemen||16 laps|
|2||I McCullough||Van Diemen||+0.061|
|9||Robert Johnston||Van Diemen||+52.668|
|FL: I McCullough, 1:01.384|
|1 D McCullough 180 2 Davidson 141 3 Herron 104 4 I McCullough 71 5 Blair 68 6 Scott Finlay 52 7 H Campbell 39 8 Nicholl 38 9 Fenton 35 10 McBurney 17|