The Daytona Prototype international (DPi) will make its competition debut in the IMSA WeatherTech SportsCar Championship season-opening Rolex 24 At Daytona next January. All DPi cars will use the same chassis, suspension and many other components as LM P2 cars competing in championships governed by Automobile Club de l’Ouest (ACO) technical regulations, such as the Federation Internationale de l’Automobile (FIA) World Endurance Championship.
A 2017 IMSA DPi car is a standard ACO/FIA homologated 2017 LM P2 Prototype chassis from one of the four approved constructors (Dallara, Onroak Automotive, ORECA or Riley/Multimatic) fitted with IMSA-homologated, manufacturer-designed and branded bodywork and engines. Each participating DPi manufacturer must partner with one of the four approved constructors and commit to a bodywork and engine package.

For DPi cars, IMSA has defined specific areas of the bodywork regulations to allow manufacturers design and stylistic freedom to create recognition of their specific brands. These areas include the nose and sidepod areas, rear-wheel arch and rear valance. Manufacturers will use this stylized package in conjunction with their eligible specific engine and electronic systems. However, the expanded bodywork freedom will not create a situation of confusion in identification between DPi cars and GT cars.
DPi cars, 2017 LM P2 cars and closed-cockpit 2016 LM P2 cars with IMSA-homologated engines will be eligible. After the 2017 season, 2016 LM P2 cars no longer will be eligible.
Manufacturers have the freedom to run factory teams or make their car available to customers as they desire. In the IMSA WeatherTech SportsCar Championship, all cars competing in the Prototype class will use Continental tires and E20 fuel provided by VP Racing Fuels.

All DPi and LM P2 cars will undergo comprehensive wind-tunnel testing programs to ensure competitive balance from an aerodynamic perspective. Teams fielding DPi cars and LM P2 cars will have the ability to use some approved aerodynamic add-ons, enabling them to tune their cars to each track. This will promote diversity in car setup and stimulate competition.
Each engine also will undergo IMSA’s standard engine testing and verification. The target power level is 600 bhp and a comparable level of power and torque will be determined for each option.
IMSA expects the technical regulations for both DPi and LM P2 to be finalized this month to enable constructors and manufacturers the ability to move forward with the project and meet established deadlines. These cars will make their competition debut next January in the 55th Rolex 24 At Daytona.