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I fabricated true dual exhaust for my 2009 Silverado this weekend and have been plagued by horrible drone at 2000 RPM. cat back is 3" exhaust with x pipe right after cats and 10" flex pipes. dual exits before the rear wheel with 5 inch tips. Unsure if I should add a resonator and if so which one. don't want to loose the volume or flow but cant deal with the drone. will post pics of system soon. anything helps

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8 hours ago, KrustyCraftsmen said:

I have speedway race bullets on pretty much shells.

Then they are not mufflers, just large opening pipes.  You need a straight through kind of muffler that has some sound absorbing in it.  You will not loose any performance. 

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