Toyota locked out the three quickest times at the official test day for the 24 Hours of Le Mans, beating Porsche and eclipsing the pole position time from 2016.
Kamui Kobayashi produced a fastest lap of 3:18.132s behind the wheel of the #7 TS050 Hybrid to head the order after eight hours of running at the Circuit de la Sarthe.
Kobyashi's effort, set during the four-hour afternoon session, was 1.6 seconds quicker than the pole figure set by Neel Jani 12 months ago.
RESULT: 24 Hours of Le Mans test day
Under clear skies and without major incident, all 60 cars turned laps to register themselves for the 85th running of the French endurance classic on June 17-18.
Completing Toyota's sweep of the top three places were the #8 car driven by Kazuki Nakajima (3:19.290s) and the additional #9 entry of José María López (3:21.455s) on the Argentinian's return from injury.
The nearest Porsche 919 Hybrid was 3.380 seconds adrift of Kobayashi's marker.
Earl Bamber clocked a 3:21.512 effort, under a tenth shy of Lopez's best, to end the day fourth quickest overall after an engine replacement curtailed its total number of laps.
The sister Porsche rounded out the top five with a 3:22.100 courtesy of Jani.
In LMP2, Signatech Alpine broke the class lap record with Nelson Panciatici running a time of 3:28.146s.
Panciatici's afternoon attempt behind the wheel of the team's #35 Alpine-badged ORECA was not only eight seconds quicker than last year's LMP2 pole time, but would have been enough for pole position outright in 2006.
To cap an impressive day for the class-defending outfit, Andre Negrao topped the opening session on his debut at the La Sarthe circuit.
Second quickest in class was Jean-Eric Vergne in the #24 CEFC Manor ORECA-Gibson, seven tenths down on Panciatici, while Alex Brundle completed the top three for the Jota Sport-run Jackie Chan DC Racing squad.
Corvette tops GTE-Pro
Chevrolet Corvette beat its rival WEC manufacturers to take the fastest time of the day in GTE-Pro, thanks to a 3:54.701s effort from Oliver Gavin.
Gavin, who is set to take part in his 17th Le Mans, out-paced Porsche 911 RSR driver Frederic Makowiecki by three tenths of a second.
Makowiecki's Porsche stable-mate Kevin Estre followed up with the third quicket time, edging out Antonio Garcia in the sister Corvette.
The turbocharged Ford and Ferrari entries offered a slower pace than at May's 6 Hours of Spa WEC round, with last year's Le Mans protagonists falling behind their naturally aspirated rivals in Corvette, Porsche and Aston Martin.
In GTE-Am, a 3:58.250s flyer from Pedro Lamy put the championship-leading Aston Martin Vantage on top of the class pile, with the glow-in-the-dark Larbre Competition Corvette lapping 0.052 seconds off.
