Josh Moffett won the battle of the brothers in their R5 Ford Fiestas on the Monaghan Rally, finishing 40 seconds ahead of elder sibling Sam on their home event.
In a perfect warm-up for next weekend's Rally of the Lakes in Killarney where he will defend his lead in the Irish Tarmac championship, Josh led from start to finish, setting fastest times on eight of the nine stages to see off the challenge of Sam and the WRC Subaru of seven-times winner Niall Maguire.
Another driver heading to Killarney after a winning weekend is Joe McGonigle who dominated the Lark in the Park in his S2000 Skoda Fabia. He fought off the initial challenge from the Subaru of Frank Wray and then the Ford Escort of Adrian Hetherington to win by 16 seconds.
Hetherington finished second with John Bonner's Escort a further 13 seconds back in third.
At Kirkistown, Noel Robinson increased his lead in the Northern Ireland Formula Ford championship with two victories in his Van Diemen.
The first round of the Blancpain European GT Endurance series at Monza proved disappointing for Ulster drivers Steven Kane and Andrew Watson. After trouble during qualifying, Kane could only manage 14th for Bentley and Watson w2as 36th after his McLaren spent several laps in the pits for repairs.
Meanwhile Hayden Paddon ended Volkswagen's run of 12 successive World championship wins when he scored his maiden WRC victory for Hyundai on Rally Argentina.