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I installed the K&N 63 Series Aircharger a couple of weeks ago. The installation directions said TO INSTALL the honeycomb filter (pre catalytic) so I removed it carefully from the stock factory and placed in the K&N. Now I noticed that Alternative Auto Performance http://www.alternativeauto.com/prodserv/05mustang_tune.html suggests to remove it.
So now I am confused --- in or out? Does it void warranty if removed? I will be getting my SCT x-cal tomorrow so I want my Mustang to really name that tune ---- Thanks!!!
So now I am confused --- in or out? Does it void warranty if removed? I will be getting my SCT x-cal tomorrow so I want my Mustang to really name that tune ---- Thanks!!!