IndyCar hopes teams agree with aerokits as part of plans to improve speed, safety through 2021

IndyCar has come up with a strategy through 2021 to make its cars faster and safer in hopes of winning back old fans and attracting new ones.

Now it's up to team owners to sign off on the plans.

IndyCar president of competition Derrick Walker says the gradual changes will happen only if a majority of the owners agree with the proposals.

The sanctioning body spoke with teams and manufacturers Saturday about new aerodynamic configurations known as aerokits. IndyCar hopes to use them during the 2015 season along with other technical innovations going into the next decade.

Walker presented the plan at a news conference Sunday before the second of two Detroit Grand Prix races.