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911s -74 airbox
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eastbay
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Join Date: Jan 2011
Location: Gulf Coast FL
Posts: 1,485
If you don't have the airbox drain set up you need to plug that hole otherwise you are drawing unfiltered air.
If you have not adjusted the WUR your problem probably lies there.
Check this link
Made an Adjustable WUR- Step by step, got Pics!
10-20-2017, 08:07 AM
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eastbay
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