The four constructors who will provide LM P2-style chassis for the TUDOR United SportsCar Championship plus Le Mans and other international sportscar competition have been announced by IMSA, the ACO and the FIA.

The four constructors are: Dallara (Italy-United States), Onroak Automotive (France), Oreca (France-United States) and the joint-venture Riley Tech/Multimatic (USA, Canada and the United Kingdom).

The decision will be rubber-stamped by the FIA World Council on Friday.  While multiple engines and bodywork updates will run in the TUDOR United SportsCar Championship, the ACO and FIA events will feature a single engine manufacturer which will be announced in September.

“The process we followed with our partners at the ACO and the FIA to select these four chassis constructors was unprecedented in its level of professionalism and collaboration among three major governing bodies in international motorsport,” Scott Atherton, President of the International Motor Sports Association said.

“It was the most thorough and detailed selection process we’ve ever seen in the sport.

 “Arriving at this decision was not easy, as there were many qualified candidates, but it represents a key landmark as we chart the future of the sport in the United States and abroad. However, this is only the beginning. There are many other important stops along the way before we have the honor of debuting the new Prototype at the Rolex 24 At Daytona in 2017, but this process confirmed a good result and is a major step forward.”

On June 11, 2015 the main guidelines of the 2017 LM P2 regulations were unveiled during the Automobile Club de l’Ouest’s press conference. The aim of these regulations is to ensure long-term success for this category thanks to a reduction in costs, the guarantee of stability in the regulations and the intention to bring the performance of the cars in the category closer to those of the current LM P1s. They will be applicable in the Le Mans 24 Hours, the FIA World Endurance Championship (WEC), the Asian Le Mans Series (Asian LMS), the European Le Mans Series (ELMS) and in the TUDOR United SportsCar Championship. 

The target horsepower for cars in all series is approximately 600bhp, and an Adjustment of Performance process will be used to ensure competitive balance. The ACO, FIA and IMSA also will select a single electronics supplier for all cars this September.

TUDOR Championship Prototype teams will be eligible to use the same engines and chassis they race with in the United States at the Le Mans 24 Hours and in ELMS events, providing they utilize the constructor-specific bodywork as used in all championships outside North America. Likewise, all LM P2 teams will be eligible to race in all TUDOR Championship events using the same chassis and engine configuration they use in their home championship.

The Dallara, Onroak Automotive, Oreca and Riley Tech/Multimatic teams now will join the technical working group jointly managed by the ACO, the FIA and IMSA to define the final details of the regulations. One of the main objectives of this working group is to optimize all of the parameters to ensure the most economically viable set of rules for the teams.