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Silverado 2500HD with 6.6 Gas Fuel Mileage

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    • #790061
      EdL
      Participant

      Anybody upgrade their Silverado 2500HD 6.6 gas with a Borla Exhaust and an S & B Cold Air Intake to get better fuel mileage?
      Just wondering if it really helps?

    • #790552
      Parts Man1
      Participant

      Neither one will hurt

    • #790611
      EdL
      Participant

      I just installed the Borla exhaust a couple days ago.
      Awesome sound
      I’ll post any mileage improvement if I see any.
      Next will be the Cold Air Intake

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