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Fuel lines, which connect all the units of the fuel system, are
usually made of rolled steel or, sometimes, of drawn copper. Steel
tubing, when used for fuel lines, is generally rust proofed by being
copper or zinc plated.
Fuel lines are placed as far away from exhaust pipes, mufflers, and
manifolds as possible, so that excessive heat will not cause vapor
lock. They are attached to the frame, the engine, and other units in
such a way that the effect of vibration is minimal, and so that they
are free of contact with sharp edges which might cause wear. In areas
where there is a lot of movement, as between the car`s frame and
rubber-mounted engine, short lengths of gasoline resistant flexible
tubing are used.
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