Porsche extended its advantage in the World Endurance Championship drivers' and manufacturers' stakes with a commanding one-two result at the 6 Hours of Mexico.
Brendon Hartley, Earl Bamber and Timo Bernhard commanded the fifth round of the season to claim their third consecutive victory, as Toyota struggled for pace.
Hartley led away from pole with Nick Tandy close behind in the sister car, but a drive-through penalty for speeding in the pit lane enabled the #2 919 Hybrid to steal a march at the front.
After double stints from Hartley and Bamber, Bernhard rode through a pair of full course yellow periods during the fifth hour to take victory by seven seconds from Neel Jani in the recovering #1 machine.
The first FCY occurred when a baseball found its way onto the circuit at turn four, while the second was called for car-related debris on the racing line.
Toyota finished third and fourth, with the Sebastien Buemi/Kazuki Nakajima/Anthony Davidson TS050 claiming the final podium spot.
Despite challenging Porsche during qualifying, the Toyotas never had the outright pace to match their LMP1 rivals, with both finishing off the lead lap.
The second Toyota completed the top four as each of the top category's runners avoided mechanical problems and on-track incidents.
The result means Hartley, Bamber and Bernhard extend their lead in the drivers' championship to 41 points over Buemi, Nakajima and Davidson with four races remaining.
In LMP2, Vaillante Rebellion drivers Bruno Senna, Nicolas Prost and Julien Canal secured the first victory for the Anglo-Swiss squad since its transition from the LMP1 category at the end of last season.
Senna led the field early on after surging through from the second row of the grid, before handing over to Prost at the first opportunity.
Canal put in a solid middle stint, although during the second half of the race the lead switched between the Rebellion crew and the Manor ORECA of Jean-Eric Vergne, Ben Hanley and Matt Rao, which ran a different strategy.
A strong double stint from Senna helped establish a gap between the two entries, while Hanley battled for second with the Signatech Alpine A470 co-driven by Nicolas Lapierre, Gustavo Menezes and Andre Negrao.
An unforced error from Hanley at the Foro Sol stadium section allowed Lapierre to slip past, although the Manor driver managed to preserve the final podium spot ahead of the G-Drive Racing ORECA and the sister Rebellion.
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Penalty hands GT win to Aston
Aston Martin clinched the top spot in the GTE-Pro category, after the leading Ferrari 488 was dealt a 10 second time penalty during the final hour.
Davide Rigon was leading Nicki Thiim narrowly when the AF Corse Ferrari driver picked up the violation for speeding during a full course yellow.
The two crews had diced relentlessly since the start of the contest, with Marco Sorensen making a pass on Rigon's team-mate Sam Bird during the second hour, before Rigon returned the favour in hour five.
The result marked the first win of the season for the defending class champions, who had not finished on the podium in 2017 until this weekend.
Aston Martin's sister car, meanwhile, retired early with a braking issue.
Porsche took third in GTE-Pro with Frederic Makowiecki and Richard Lietz, while points leaders Andy Priaulx and Harry Tincknell settled for fourth in their Ford.
GTE-Am honours went to the Proton Competition Porsche squad for the second race in a row.
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