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Intake Air Butterflies - a valve that opens and closes to switch between two available passages in the intake manifold. This is done to allow the use of a longer runner at low RPMs for increased torque and a short runner at high RPMs for more power. Found on GSR and H22A intake manifolds.

Revision: r1.1 - 19 Feb 2004 - 22:01 GMT - guest { Edit | Attach | History | More }
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