All IndyCar racers will compete with twin turbocharged engines next season.
The series announced the move Thursday.
The Chevrolet engines have been using twin turbochargers since re-entering the series last season. Honda, IndyCar's sole engine producer from 2006-11, has been using a single turbocharger. No changes will be made this season.
IndyCar president of competition Derrick Walker says the series hopes the change creates even closer races than those this season and that both engine manufacturers were willing to adapt.
In May, Hulman & Co. CEO Mark Miles said he would like to see IndyCar drivers challenge Arie Luyendyk's record for fastest qualifying lap at Indianapolis - 237.498 mph, set in 1996. Nobody has come close to that mark since the engine specs changed in 1997.
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