head unit that features an audio input jack. In addition, all models except the LS and LT1 now used a 5x110 wheel bolt pattern. The LS and LT1 retained the standard 4x100. In addition, the 2007 model year marked the introduction of a new 32-bit computer that replaced the 16-bit unit from 2006. 2008: The 2.4 L naturally aspirated, high-output SS coupe and SS sedan were renamed to just "Sport Coupe" and "Sport Sedan" respectively. The new Cobalt SS features a turbocharged engine, replacing the Supercharged engine which was offered from 2005–2007. At mid-year, the fuel economy was increased to 5.5–7.5 km/liter city, 9–11 km/lite highway on the LS and 1LT, coupe and sedan models with manual transmission; now labeled with XFE badging (X-tra Fuel Economy). XM Radio, side-impact air bags for improved safety, and MP3 player were now standard instead of optional. StabiliTrak stability control system was introduced. Other changes included the adding and removal of several exterior and interior colors. The new SS (turbocharged) coupe launched near the end of May 2008, as it was a facelift from the 2005–2007 version. 2008 (Special Edition "Revolution" Package): The special edition package for the Cobalt was introduced on August 16, 2008, which featured all the options that were available on the previous SS models except the turbocharged 2.0 engine. Instead it was once again built with the 2.4 naturally aspirated engine similar to the Cobalt Sport models. The special edition package could come with a sunroof, GM ground effects kit, the Getrag F23 5-speed manual transmission, and additionally the 5 lug wheel bearings that the SS editions featured. The special editions were all had a "Special Edition" badge and came with unique variations of colors, and racing stripes. 2009: The 2.4 L naturally aspirated "Sport Coupe and "Sport Sedan" models were both deleted, along with the 2.2 L L61 engine. Both were replaced by the 2.2 L LAP engine thus providing better fuel economy and more power. Also, a 2.0 LNF Turbo SS sedan was added to the lineup. Three exterior colors were changed, and an interior color deleted. Bluetooth capabilities were added. An option for a reconfigurable performance display available on the SS coupe, could read out various engine output data and alter performance settings. 2009 (Team Canada Edition Package): For Canada, a "Team Canada Edition Package" was offered beginning in 2009 and continuing into the 2010 model year