Hickman and McWilliams extended their totals of wins in the SZupertwins/Sportbike cartgeory.
Hickman edged out McWilliams to take victory in a thrilling opener, with the Northern Ireland rider coming home first to occupy the top step on the rostrum in race two.
Swan Racing Yamaha R7 rider Hickman executed the decisive pass at the Juniper Hill chicane on the final circuit of four to take the fifth North West win of his career and his third in the Twins class following his double in 2024.
The Lincolnshire rider had 0.46 seconds to spare over McWilliams, who led for the duration of the race until Hickman hit the front when it mattered.
The pair were involved in an exhilarating dual at the front, with Seeley holding off Jordan to secure the final rostrum position.
Jordan recovered ground after overshooting at University Corner on the first lap, posting the fastest lap of the race at 112.231mph in taking fourth spot.
Yorkshire’s Jamie Coward was fifth on his Milenco by Padgett’s Paton, with Christian Elkin completing the top six.
McWilliams led from start to finish on his Flitwick Yamaha to grab his fourth Supertwin win at the North West and his first since 2019 in race two.
Jordan was 5.8 seconds behind the winner in second, with Seeley third, then Coward, Franco Bourne and Elkin.
Hickman retired while battling for a top-three place, while Jordan set the fastest lap with 112.351.
