By lap 72, the window for the final pit stop to get to the chequered flag opened, and sure enough Kurt Busch was into pit lane ceding the lead to Tony Stewart. Kurt was still confident, but reporting that the car was generally a little loose but at the same time too tight in turn 1. He returned to the field in 12th place and was soon moving up the positions, but differing pit stop strategies meant that he would not see the lead again for another 16 laps, as the position was assumed in turn by Stewart, Juan Montoya, David Gilliland, Kevin Harvick and Regan Smith until their own final pit stops cycled through.
After his earlier conflagration with Tony Stewart, Brian Vickers had impressively worked his way back up into the top five during this stage; then on lap 87 he seemed to falter and drop back, which put him right on track behind Stewart again. It wasn't a coincidence.
"He made his bed at that moment [on lap 39], and he had to sleep in it," Vickers said bluntly, not concealing the payback nature: "He wrecked me, and I dealt with it."
He ploughed into the back of Stewart's #14 into turn 11 - fittingly, the same place as the earlier incident - and sent Stewart backwards so that it ran into and onto the tyre barrier, coming to rest with the crumpled back of the #14 propped up at a thirty degree angle. It took a lengthy time for the safety workers to get the #14 down from its precarious perch, and the car beyond repair while Vickers was able to continue albeit with a lot of wrecked bodywork stripped off.
Stewart less less angry than resigned about the payback - and resolute. "I dumped him earlier for blocking and he got me back later on," Stewart said. "If they block, they are going to get dumped. It is real simple. I mean, I don't blame him. I don't blame him for dumping us back.
"I don't race guys that way. I never have. If guys want to block. then they are going to wrecked every time. Until NASCAR makes a rule against it, I am going to dump them every time for it. He did what he had to do and I don't blame him. There is nothing wrong with it."
Vickers also felt that there was nothing personal about it and it was just on-track business that wouldn't have any lasting after-taste: "We were joking and laughing last week and had a great race," he said, recalling that their last serious spat had been right here at Sonoma in that same turn 11. "I'm not angry. I'd rather have been racing for the win and worrying about something like that."
Several cars now pitted, but Kurt Busch wasn't about to give up on his two-stop goal even with the allure of a fresh set of tyres for the final 18 laps or the safety blanket of a little extra fuel, and so he stayed out and assumed the lead again at last for the restart on lap 92. Behind him for the green flag was Martin Truex Jr., Kasey Kahne, Carl Edwards and Brad Keselowski - a particularly good showing for Edwards who had started off on Friday in shocking form until he'd decided to eliminate his Nationwide distraction. At the green flag, Edwards was quickly up into second and Keselowski into third place.
Further back, Juan Montoya had been one of those cars to pit for fresh rubber for the final stint and was now doing battle for sixth with Jeff Gordon. Winning that one, Montoya then went after Kasey Kahne - and proceeded to send the Red Bull onto the grass as the Colombian turned up the aggression factor to 11, and paid for it by losing a couple of positions. Not discouraged, Montoya's next target was David Gilliland, and hard as Gilliland tried to hold him off - including some light contact - there was no stopping Montoya's single-minded charge and he was through back to sixth place again.
With ten laps to go, the order at the top was Kurt Busch followed by Edwards and Keselowski, then Jeff Gordon, Martin Truex, Montoya, Kyle Busch, Harvick, Bowyer and Marcos Ambrose, who a few laps earlier had spun Dave Blaney around through turn 7 as he tried to assert his own road racing credentials.