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70rsss

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  • Name
    Scott
  • Location
    Houston
  • Drives
    2019 GMC 6.2 SLT

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  1. Has anyone just cut out the two 6.2 exhaust flapper vales and left everything else stock? I have two fast and loud cars I don’t need a semi fast and loud truck. I would love to pick up power just not noise….. Just not sure if eliminating the valve would pick up HP?
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