There was joy for visiting crew Dave Pattison and Paul Whittaker in the PokerStars Rally.
They finished 27 seconds ahead of locals George Collister and Janet Craine in their Mitsubishi Evo 6.
Martyn Jones and Maurice Snell were a further one minute 24 seconds behind with Daniel Harper and Paula Swinscoe in fourth place in their Mini Cooper.
Nigel Cannell and Nick Kaighin were fifth in their Vaxuhall Corsa with Tim Collins and Paul McCann completing the top six.
Modern sidecars returning to Southern 100 in 2027
F2 machinery was excluded from this year's event over safety concerns
Hockey: Isle of Man Men's Over-35's march on in EH Championships
Island side scores seven again to beat Macclesfield
Archery: Isle of Man lineup announced for 2027 Island Games
Nine athletes called up for next year's event in the Faroe Islands
Gymnastics: Island duo put in positive performances in Telford
Kruger and Hampton claim top-ten finishes