Coleraine brothers Richard and Peter Chambers won gold in the lightweight men's four at the World Cup in Munich on Sunday.
They were part of the Great Britain crew which impressed as they beat Australia by a length for their first gold of the year.
Their was disappointment for Alan Campbell, who had to settle for bronze in the single sculls final.
The Coleraine man was favourite to win but struggled in a weak field.
Campbell was ill with dehydration after winning his semi-final on Saturday and he looked short of fitness as he finished over five seconds behind winner Marcel Hacker of Germany.
All three Northern Ireland men will compete for Britain in this summer's Olympics.