Allan McNish brought the curtain down on his American Le Mans Series title-winning season in style with another victory at Laguna Seca.
Allan McNish lit up the event in California
McNish and co-driver Dindo Capello steered their diesel-powered Audi R10 TDI sportscar to a seventh outright win and an eighth in the LM P1 class.
"It was a thrilling race, from start to finish," said the Scot.
"This is a superb way to end a phenomenal season - a perfect 100% record for the Audi R10 TDI."
The pairing, already assured of the ALMS Drivers' crown, which will be presented at an awards evening in Monterey, started the 10th and final 2006 ALMS race from fourth place on the 27-car grid.
Capello handed over to McNish in the lead after one hour and 18 minutes.
Everyone in the team worked very hard for this victory
But the Scot, having just got back into the lead himself, required an unscheduled pit-stop to replace a damaged front nose section.
Further time was lost when McNish then served a 15-second stop-go penalty after officials deemed an unsuccessful overtaking manoeuvre as "avoidable contact".
But a quick succession of safety car periods saw McNish begin the final hour of racing leading once more after dropping to seventh place.
Dumfries-born McNish - who won the corresponding Laguna race in 2000 by a mere 0.352secs with Capello - crossed the finishing line 18.579secs ahead of the sister Audi car of Frank Biela and Emanuele Pirro.
"We had a number of brushes with other cars, more than in any other ALMS race this season, including a stop-go penalty for an unfortunate situation - the incident was no-one's fault," said McNish.
"After that, we just had to throw the dice on strategy and thankfully it worked out for us, but everyone in the team worked very hard for this victory."