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Title: Useless because of incomplete information
Review: This product would have been a perfect fit for my application... except Amazon doesn't specify that there's a 5/8 hole on the back of the air filter. I've worked google over, to see if K&N sells a blocking plate or something else to plug the hole, with absolutely no success. I've even searched to find why the hole exists, with very little success (my best guess is that it's for vehicles with an intake air temperature sensor). Now I'm left to deal with a return, or work some magic with J-B Weld and some spare hardware, to force this thing to be functional.
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