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The EGR system routes many of the exhaust gases (6 ? 10%) through the EGR valve, last on the Intake System, and in the end in the combustion chamber. The exhaust gases are inert i.e. they don't burn within the combustion chamber; also, the exhaust gases use up a number of the space which could preferably be taken with the intake air. This decreases the volume of intake air available for the combustion process during each Power Stroke; which experts claim decreases the peak combustion temperatures. This leads to lower NOx emissions. Car sales witness an enormous improvement inside month of June 2011 in America. June 2011 is a great and solid month for American car makers including Chrysler, Ford and GM. According to the website Cars.com Windows 7 finally gives the Windows desktop everything it deserves and all the features that used to be filled by third-party applications. It is easy to manage and provides endless eye-candy for the user, with the minimum of fuss and a tiny number of clicks and windows to browse through.