Porsche unveils revised 911 RSR for WEC, IMSA

The Weissach marque took the covers off the new machine, based on the 991.2 version of the road-going 911, at the Goodwood Festival of Speed on Saturday.

It replaces the 911 RSR that was introduced in 2017, and will make its race debut in the opening round of the 2019/20 WEC season at Silverstone on September 1 after an extensive test programme that commenced last August.

Porsche GT motorsport boss Pascal Zurlinden said that "95 percent of the car is new" in relation to its predecessor, which sealed the 2018/19 WEC manufacturers' title as well as victory in the Le Mans 24 Hours last year.

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Zurlinden added: "We have made significant progress in the development of our car for the next three-year homologation period, especially in the complex areas of driveability, efficiency, durability and serviceability.

"The only components that we’ve kept unchanged from the predecessor are the headlights, brake system, clutch, driver’s seat and parts of the suspension."

Kevin Estre and Michael Christensen will defend their WEC title next season in the #92 911 RSR, while Gianmaria Bruni and Richard Lietz will once again team up in the sister #91 machine.

Both driver pairings will be pitted against two crews apiece from Ferrari and Aston Martin in a slimmed down GTE Pro battle following the withdrawal of Ford and BMW from the class.

Porsche's CORE autosport-operated IMSA squad, which currently leads the GT Le Mans class standings, will give the new car its US debut in next January's Rolex 24 at Daytona.

The existing car will race on in the WEC during the 2019/20 campaign in the GTE Am class before the new version is made available to customers the following season.