What is the function of exhaust flex coupling?
by 
jazmin ali ali
ANSWERS: 3
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http://www.prostreetonline.com/s/fabrication_exhaust-flex-section.asp
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The Engine is party to both the drive train and the exhaust system, and those two things are allowed to move about in relation to each other, since the exhaust is suspended from the frame and the drive train is on the suspension connected to the frame. Therefore there can be a good amount of flexing and mechanical difference of position and angle where the exhaust meets the manifold. To avoid stress cracking and destruction of the exhaust tubing, the flex coupling allows for some movement without damage.
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To avoid stress cracking and destruction of the exhaust tubing, the flex coupling allows for some movement without damage. Your engine (the big thing that the exhaust manifold is mounted on) moves, constantly.
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