It was confirmed that the team would start the season without the Kinetic Energy Recovery System, but senior figures suggested they would adopt it if the car proved successful,[3] however the team continued for the rest of the 2011 season without KERS. The team changed from the Cosworth CA2010 engine used in 2010 to the Renault RS27 series, as well as exchanging a transmission developed by X-Trac to one built by Red Bull Technologies. The design of the T128 also incorporated a "bladed" rollbar similar to the one developed by Mercedes in 2010, but thicker and with sturdier air intakes to conform with FIA regulations.