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      12-10-2010, 11:14 AM   #194
Diokaef
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Drives: M235I 2015, 335i 2011
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2008 Z4M Coupe  [6.33]
Yes and No, A exhaust is not just the pipes, so in our system the ceramic coating has a purpose, since we increased the diameter of the pipe.

Bigger diameter pipes flow slow and the flow will be cooler causing back pressure,
using ceramic coating inside and out of the pipe will keep the heat trapped inside tanking longer to cool down.

Hot gases flow faster then cooler ones.

that is the easy way to explain.
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