ergo Posted September 8, 2011 Share Posted September 8, 2011 I just removed my K & N permanent air filter for cleaning and reoiling and replaced it, temporarily, with a regular paper element filter (MANN). I'll go back to using the K&N soon( I've never had any problems with it or because of it). Now, at certain engine RPMs when stepping fairly hard on the gas pedal there is a loud boomy exhaust noise which wasn't there before. Anyone have any idea why? Link to comment Share on other sites More sharing options...
Meeky Moose Posted September 8, 2011 Share Posted September 8, 2011 make sure your air box is closed all the way, sounds like its not.. Link to comment Share on other sites More sharing options...
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