Michael Laverty clinched his first British Superbike win of the season in Sunday's final race at Brands Hatch.
The Toomebridge rider won by 0.23 seconds from James Ellison in the third race after finishing third in race two.
Carrickfergus man Glenn Irwin ended his Supersport campaign by coming in third in the feature race to finish fourth in the standings.
Josh Elliott secured another Supersport 1000cc victory as the champion from Fermanagh ended the season on a high.
Alastair Seeley, the Carrickfergus rider who was Elliott's closest challenger for the title, was forced out after five laps.
Laverty was ninth in the Superbike opener on his Tyco BMW before a third and first left him fourth in the series.
Superbike champion Josh Brookes won the opening two races on the English circuit.
Portadown's Marshall Neill finished ninth in Saturday's Supersport sprint race, in which Irwin was an early retirement.