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O.k. so now you got me realy confused...
What i see in my car is pipes which look like any other exhaust manifuld, then those big things under the valve covers, which i beleive are there in order to burn my car when some oil spils on them, what a clever idea. but still i thought those are the heat exchangers. they have pipes coming up for this purpose. then there is the muffler itself. no catalitic or thermal thing as far as i could see. all i see is the air pump. so, i put 96 leaded fuel in it because a car that is not designed to use unleaded can be damaged, all this despite unleaded sims to be better quality, and cheaper...so what have i missed??
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