Gordon Shedden continued to lead the way at Knockhill after pacing the second Dunlop MSA British Touring Car Championship practice session of the weekend.
On home soil, the Scot set a time of 53.092secs which allowed him to beat the older Honda Integra of Paul O'Neill to top spot by two-tenths of a second.
Shedden was the busiest driver during the session with 34 laps on the board, while O'Neill completed just twelve before calling it a day.
Matt Neal was third quickest in the second of the Civics to complete a Honda 1-2-3 while points leader Jason Plato was fourth in his Chevrolet Cruze.
Alex MacDowall followed close behind in the sister car, with Tom Chilton quickest of the LPG-powered Fords in sixth.
Elsewhere, Steven Kane was top BMW runner in ninth place while James Nash was twelfth as he took the track to complete his first laps after gearbox issues earlier in the day in his Triple Eight Vectra.