November 28, 2022 6:49 PM.

November 28, 2022 6:49 PM ET.

The NTT IndyCar Series has a new rear attenuator in the works that will be implemented heading into 2023.

“Our current attenuator has evolved slightly over time, so when I joined IndyCar, the original DW12 attenuator became the source of development after a few drivers complained of having headaches after backing the car into the wall on street courses,” IndyCar director of aerodynamic development and veteran chassis designer Tino Belli told RACER.

“So the steps taken on the old attenuator were to change the backface, which was originally solid and all molded in.

And then we thinned this section out and basically went from a core with two skins to having one skin so that on a rearward impact, the attenuator had some softness before it started really crushing and taking out a lot of energy.

Rather than wait for the new 2.4-liter twin-turbo hybrid V6 formula change, IndyCar will spend 2023 learning how the revised attenuator, which is made from the same composites used to form an IndyCar chassis, performs and if any additional changes are needed, it will have time to make those design adjustments prior to 2024.

“The key thing about the new attenuator is, it’s longer and the shape has changed,” Belli said.

This new profile helps the attenuator retain its shape while it’s being crushed in a rearward impact, and that allows it to crush in a much more predictable way.

The last new item to complement the revised attenuator is a larger rain light.

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