They took the wins in the final round of the World F2 sidecar Trophy and the three British 600 Cup championships.
Having already clinched the world title, the brothers also secured the British title this weekend with four races left to race.
First race up was the World championship round where they were racing as champions elect, having secured the F2 Trophy in the last round.
Ben and Tom qualified for a third row start in the mixed grid of riders, the FIM F1 World championship and the FIM World F2 Trophy.
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The Mansfield pair were the fastest of the F2 runners and as the lights went out they moved into sixth place overall and first in class.
On lap three they overtook Brian Gray on a F1 machine and held station to the chequered flag at the end of a very fast and furious 15 lap affair, taking the win in the World F2 Trophy class.
In the first of three British Sidecar 600 cup races the laps were cut to eight instead of 10 to make up for time lost when a fellow competitor broke down on the warm up lap.
At the start they settled into sixth place overall and were elevated to fifth when one outfit was black flagged. They were right on the tail of Archer/Thomas and as they approached the finish line were just about level, crossing the line just two tenths of a second behind in eighth place to secure another victory in the 600 Cup.
In the second affair they started from the third row and completed the ten lap race in seventh place - and a win in the 600 cup.
Ben and Tom then started from the fourth row in their final race and after dicing with Walker/Hawes for a few laps they finally passed them to finish the 10 laps in sixth position overall and take their fourth win of the weekend in their own class.
They were presented with gold medals in the World Trophy.
Ben said: “We have had a fantastic season as we also won at the Isle of Man TT again this year. We are delighted to be able to help Steve Smith at Avon tyres who is auctioning a TT memorabilia poster containing signed photos of some of this year’s riders including us. It is being auctioned by Damon Hill OBE to raise money for Downs Syndrome Association online on Thursday, September 22 a link to place a bid please check out www.DHgolfclassic-auction.com.”
And added: “Tom and I plus all the team are thrilled to be presented with our world championship Gold Medals on home soil; also to secure the British 600 Sidecar Cup this weekend. It’s a great end to our season. We have to thank our sponsors and supporters for their continued support. We have so much confidence in the bike, it’s been perfect all season and the data we have gained from this season will help us when we challenge for the new format World championship and British title in 2017.”