I recently had this car here and have done some upgrades to the stereo system since then. before it had the all Boston Acoustic system now i have had it replaced with an entire Image Dynamics set-up and have to say that it is one hell of a system. This is a 2008 Saturn Aura XR with all of the bells and whistles. It has the nav system through Kenwood and the system is the Image Dynamics. It has the Beltronics Pro series anti radar/lazer system. I have had the factory grill removed and the billet grill put on. (a nice touch). All saturn emblems have been removed and all GM emblems removed as well. I Have had the back-up sensors added to the rear bumper and all of the wheels have been stripped of the chrome and powder coated black. The stereo has the Image Dynamics Q450.4 4channel amp, the Q600.1 amp for the sub, the XS65 components for the front and the IDQ12D4V3 subwoffer in a custom made down firing box that simply put (pounds harder than anything i have heard). The front window side rails had to be modified to fit the tweeters and alot of molding to them. (can't really see the finished job sorry) All of the doors and back panels have been totally dynamatted to seal any rattles and noises. There has been a 100 ferrad battery placed under the amps. The subwoofer puts out more bass and much cleaner bass than my previous 2 kicker 12cvr's together. It also has the Lo-Jack and the Blue tooth and on-star.Saturn Has come along ways in the past 10/15 years in their cars and i will admit that this aura is one awsome car. Thanks for looking.