http://www.autotropolis.com/cs/forums/72/ShowForum.aspxDiscussions directly related to the Cadillac Escalade EXT—For owners, potential buyers and enthusiastsenCommunityServer 2.1 (Build: 60809.935)http://www.autotropolis.com/cs/forums/thread/34004.aspxThu, 23 Apr 2009 04:08:35 GMT47d518e0-6f86-4bcb-9b63-62b215176eac:34004Buster0http://www.autotropolis.com/cs/forums/thread/34004.aspxhttp://www.autotropolis.com/cs/forums/commentrss.aspx?SectionID=72&PostID=34004I put a K&N Cold Air Intake System and noticed an improvement in gas mileage on my 07 EXT.  But then I put a cat-back magnaflow dual exhaust system and loss more gas mileage than I originally gained when I installed the Cold air intake system.  I think it might have something to do with replacing the massive exhaust pipe with the standard size pipe that leads into the magnaflow muffler.  http://www.autotropolis.com/cs/forums/thread/16208.aspxFri, 15 Jun 2007 16:23:34 GMT47d518e0-6f86-4bcb-9b63-62b215176eac:16208Emc0http://www.autotropolis.com/cs/forums/thread/16208.aspxhttp://www.autotropolis.com/cs/forums/commentrss.aspx?SectionID=72&PostID=16208Has anyone figured out how to get better gas mileage for the cadillac Ext? I'm not concerned with more horsepower.