Re: I'm putting the stock air filter system back on.....
The biggest thing I've noticed is really how much HOT air the K&N lets in..it is NOT sealed well to be an open filter....the engine heat KILLS the motor...I noticed that the most of all....On a 95 degree day the Hummer became a dog!! that's when I realized it had to be too much hot air getting through the lousy K&N blockoff design.....NM
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