Environment issue had become a more and more urgent issue for all the mankind, the earth is facing the destroy from us due to our unlimited devolopment and usage of resources.
Due to this, some of the spare parts already start to design with the concern of environmental issue, like the traditional intake manifold gasket, which is normally made by gasket sheet or packing paper material, which will need a mass resources of trees, is now starting to change to rubber type of gasket, in between this change, there are model that using metal type of intake manifold as well.
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