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9. Their emotional appeal While art is rampant across Cairo's galleries, rarely does an exhibition find a way to take our breath away. 'Beauty and also the Beast' ? a dual exhibition of 'The Beast' from Sabhan Adham, and 'Beauty' from Hossam Dirar ? is a illustration showing jaw-dropping talent, perfectly intertwined at Zamalek's Art Talks. The EGR system routes a number of the exhaust gases (6 ? 10%) over the EGR valve, in for the Intake System, and finally inside combustion chamber. The exhaust gases are inert i.e. they cannot burn within the combustion chamber; also, the exhaust gases take up many of the space which will rather be taken from the intake air. This reduces the level 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.