Originally posted by Stazi:
Not sure but I've seen that rig at some performance shops where you can switch between a stock paper filter and the K&N replacement filter and see the difference in flow through a pin-pong ball manometer. It's pretty cool.
Got that at my local shop too...weird thing is the ball always goes to the top no matter what filter I put on...weird
1998.5 SVT contour #5979 3L 
1995 Mercury Mystique 2.5L auto, all ghetto fo sho
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