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Message: <blockquote data-quote="devvy" data-source="post: 1541600" data-attributes="member: 30307">My 95 5.0 has bbk long tube headers, bbk catted x pipe and a pypes catback. ever since i remember it has had this extremely annoying "lawnmowery" sound at low rpms, like a ticking type of sound that gets higher with the rpms. Recently, another sound was added, a little rattle, also heard with raised rpms at around 3k. i dont see anything loose. I've checked for vacuum leaks and i'm fine. I've tightened my exhaust bolts. One thing I noticed is I could feel air coming out of the bottom of the egr, not sure if thats normal or not. I've attached a few clips where you can hear the sound. Any ideas what it could be? I'm extremely tired of hearing it. Any ideas would be appreciated. Also, for checking exhaust leaks, do I just plug one tailpipe up and run smoke thru the other? Or what's the general way to do it?[MEDIA=youtube]cWMhTmXj1QI[/MEDIA][MEDIA=youtube]mX6yRKtMSmw[/MEDIA]</blockquote>