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Message: <blockquote data-quote="drexchan" data-source="post: 1379870" data-attributes="member: 6936">The heat will still escape from the bottom and side.. but as we know, the principle of convection is that, hot air flows upwards. What I did (and many other heatshields do), is to block the upward flow thus less heat is convected to the engine bay. When the fan blows or the car moves, the heat is carried away through the bottom.BTW, the main objective of this DIY is to reduce the heat lost in the exhaust stream in the primary pipes so that the density of the exhaust gas can be lower, thus less back pressure. But the effect is very minimal lar.. what I get is more on the visual effect lar.. haha!</blockquote>

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