INDYCAR announced Thursday morning at the North American International Auto Show in Detroit a contract extension with Dallara. The new contract has Dallara providing the current IR-12 chassis through the 2020 season.
INDYCAR says the bodywork, set to start competition in 2018, will be unveiled "soon".
*UPDATED* INDYCAR has released concept drawings of the 2018 bodywork:
The images revealed will not be what the cars wind up looking like in 2018, but they provided the first public direction of the process.