Seb Priaulx edged out namesake Seb Perez by just half a tenth of a second to take his maiden Ginetta Junior Championship pole position at Knockhill.
As the track dried out following rainfall in the preceding session, it was Priaulx who topped the timesheets in his JHR Developments G40 with a 1m 01.730s effort.
Perez narrowly missed out on adding to his pole position from Thruxton earlier this year in second, while Stuart Middleton made it three cars split by a tenth of a second at the top.
Championship leader Will Tregurtha was hot on the heels of his title rival in fourth, while Geri Nicosia secured his career best qualifying result in fifth – a result that put three JHR cars in the top five.
Daniel Harper rounded out the top six as the second quickest Rookie in the field, with Cameron Roberts the final man within half a second of pole on his return to the series.
Charlie Fagg, Dave Wooder and Connor Grady rounded out the top ten, the latter taking his first ever top ten qualifying result, ahead of Olli Caldwell.
Two drivers who will be aiming to climb up the field in race one after uncharacteristic qualifying performances meanwhile are Lewis Brown (P12) and Harry King (P16).
Full qualifying results can be found here.