George Collister and Janet Craine lead the Black Horse Finance Stages Rally going into the final day.
They blasted their Mitsubishi Evo 3 into a four second lead over Friday's nine stages.
Collister grabbed the advantage after choosing a tyre with more cut - when others had wrongly predicted drier weather for the last three stages of the night.
Pre-event favourite Rob Watson is second and Mark Cubbon third.
The Saturday leg starts from the TT Grandstand at 10.05am for the final nine tests.
Isle of Man chasing Commonwealth Games basketball dream
Two Manx sides will compete in home nations qualifiers next month
Charities partnering for coast-to-coast cycling challenge in Scotland
Hospice and Motiv8 looking for volunteers
Football: Rushen beat 'old firm' rivals to progress in Hospital Cup
Foxdale take first premier league win of season to stave off relegation
FC Isle of Man awarded win for abandoned Prestwich Heys match
NWCFL releases statement confirming outcome of game earlier this month
Hockey: Castletown and Ramsey claim first silverware of cup finals
Six trophies are being decided across Friday and Saturday this week (24-25 Apr)