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The EGR system routes a number of the exhaust gases (6 ? 10%) through the EGR valve, back in for the Intake System, and finally inside combustion chamber. The exhaust gases are inert i.e. they do not burn inside the combustion chamber; also, the exhaust gases occupy a few of the space which may otherwise be taken from the intake air. This cuts down on level of intake air readily available for the combustion process during each Power Stroke; which often decreases the peak combustion temperatures. This ends in lower NOx emissions. The production of cost in every single trade is increasing with the frequent hikes in the fuels, electricity tariffs, new human friendly norms and new tax structures. No one can take risk to play with quality of product as it directly affects the manufacturer image. Instead every manufacturer is investing over before for making products better in terms of quality and appearance both. It seems a marathon effort to maintain the development cost within control submerging the hikes in the expense of inputs for longer period. Still, hiring business consulting services to get ready or improve existing business model will be seen as great help.