New version features a multilayer urethane material instead of the
OEM high density paper material. The use of urethane dramatically
improves filter efficiency. This filter cannot be washed and re-used.
Replace with normal recommended factory intervals.
Upon full opening of the throttle, a huge volume of air is drawn in
at highspeeds. Meanwhile, when the throttle is closed, an inertial force
acts and air is compressed at the instant just prior to full closing.
When the accelerator is subsequently depressed, the sealed cleaner box
is subjected to a more intense vacuum as a result of the reaction to
compression.
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