Red Bull’s recent domination has been founded partly on such developments, which were intended to be largely stopped by rule changes last winter.
Lowe said: “To the extent [Red Bull’s progress] has been down to exhausts, I’d consider that to be fair game.
“All leading teams are working in that area. I don’t have a problem with it.”
Red Bull’s step forward has seen Sebastian Vettel win the last four races and replace Ferrari’s Fernando Alonso as the world championship leader. The German is now a strong favourite to win a third consecutive title this season.