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Counterfeit Medicines are rampant in today?s society. The most vicious victims are mostly via developing and fewer developed countries which cannot afford expensive medicines and possess been patronizing generic brands. These brands are mainly purchased from small pharmacy counters which are often not licensed and therefore are unacceptable to use with the town. Exhaust gases are generated from the combustion chamber after the air-fuel mixture is burnt through the Power Stroke. These exhaust gases are "thrown out" in the combustion chamber through the Exhaust Stroke. The exhaust gases, including NOx, move through the Exhaust Valve, the Exhaust Passages and finally towards the atmosphere over the Exhaust System. 2. How aggressive these are