Kiwi drivers Brendon Hartley and Earl Bamber have all but wrapped up the World Endurance Championship title after notching a fourth successive win.
Hartley, Bamber and German Timo Bernhard powered their Porsche hybrid vehicle to victory at the United States leg of the series in Texas to open up a commanding lead.
The trio have racked up wins at Le Mans, Nurburgring and Mexico to open a cavernous advantage back to their nearest rivals from Toyota.
It would take a catastrophe in the final legs in Japan, China and Bahrain to prevent victory.
The latest win came courtesy of team orders, when Porsche bosses ordered their second car to slow down over the last hour at the Circuit of America in Austin.
British driver Nick Tandy did so, allowing Bamber to take the chequered flag after 192 laps.
Meanwhile, Hartley and Bamber are remaining tight-lipped over what their future holds beyond this year.
Porsche has said it will withdraw from the endurance class.
Hartley has been linked in report with an interest from Chip Ganassi Racing in the United States IndyCar series.
If so, he would become a team-mate of Kiwi great Scott Dixon.