Red Bull Racing's technical director Geoff Willis says the introduction of KERS to Formula One next season won't make much of a difference to overtaking.
He doubts that the push to pass affect that will be created by the recovered energy will spice up the action on track, and instead believes that it will be the new aerodynamic regulations that increase overtaking.
"I think the teams will soon learn how to use and optimise the KERS, but it won't help overtaking so much," he told Italian magazine Autosprint. "It's a technology developed on road cars that will find a limited application in F1.
"The new aerodynamics regulations will be the biggest factor at changing racing by creating new overtaking opportunities.
"The reduction in size of the rear wing will allow the drivers to race more closely, because the loss of downforce won't be as radical while in the slipstream."
But Willis says that teams will deliberately develop their cars to make it more difficult for rivals to follow in their slipstream.
"Probably one aerodynamic development will be to disturb the air flow of the following car in order to make your own car less prone to be overtaken," he added.