The no1 Porsche 919 of Neel Jani and Nick Tandy secured pole position for the 6 Hours of Circuit of The Americas with an average lap of 1m44.741.
The Anglo-Swiss pairing had jumped to the top of the timing screens earlier in the session but Tandy’s lap was deleted for exceeding track limits at T19, dropping the no1 Porsche behind the two Toyotas.
Tandy went back out and secured the pole in the final lap of the session.
Porsche secured at 1-2 in Texas with the no2 919 hybrid of Timo Bernhard and Earl Bamber setting a 1m44.994, just two tenths adrift of their teammates.
The two Toyotas were 3rd and 4th fastest with the no8 TS050 the quicker of the two cars but still 1.6 seconds behind the lead car.
LMP2: Signatech Alpine Grab Class Pole
There was high drama as the no36 Signatech Alpine Matmut of Nicolas Lapierre went to the top of the times, only to have the lap erased due to track limit abuse.
However the French driver made amends on the next lap and Lapierre and Andre Negrao took their second pole in as many races with a 1m54.024 lap.
The no13 Vaillante Rebellion was second fastest with David Heinemeier-Hansson and Matthias Beche posting an average lap of 1m54.275, two tenths behind the pole sitter and four hundredths ahead of the no38 Jackie Chan DC Racing Oreca-Gibson in third.
LMGTE PRO: Ferrari Pip Ford to Pole in Texas
Davide Rigon and Sam Bird in the no71 AF Corse Ferrari F488 secured their third pole position of the 2017 season with an average lap of 2m03.057, with Bird posting the best lap of the session with a 2m02.993.
The Ferrari duo beat the Ford pairing of Andy Priaulx and Harry Tincknell in the no67 Ford GT by just 0.199s and three tenths ahead of the no95 Aston Martin Racing Vantage.
LMGTE AM: Five from Six for Aston Martin Racing
Aston Martin Racing celebrated in the LMGTE Am class after Pedro Lamy and Paul Dalla Lana secured their fifth pole position from six races in 2017.
The Portuguese-Canadian pairing blitzed the rest of the class with a 2m06.031 average lap, 1.8 seconds ahead of the nearest rival, the no54 Spirit of Race Ferrari F488 of Miguel Molina and Thomas Flohr.
The grid is now set for the 6 Hours of Circuit of The Americas, Round 6 of the 2017 FIA World Endurance Championship, which is due to get underway on Saturday 16 September at 12h00 local / 19h00 CET.