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Old June 5th, 2011, 09:16 AM   #2
ScOoTeR
hoo dat. wat.
 
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The pump is there to provide fresh air to the catalytic converter - this allows the CC to burn any unburned hydrocarbons and lower emissions.

If you remove it, just seal the pipe going to your CC, or you'll get a pretty big exhaust leak. Shouldn't hurt anything.
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