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dual exhaust

up4x4

By up4x4
in Ask A GM Technician

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up4x4 Enthusiast

up4x4

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I am told, and have found out the hard way that true dual exhaust do more harm than good when it comes to performance, especially low end. What is the reason, is it reduced back pressure? or is it related to pcm programming? and is there a remedy without going back to stock? like reducing pipe size. I've already tried adding free flow cats and that didn't help, then i tried an airraid intake and that help. Any advice would be nice!java script:emoticon(':D')

smilie

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