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  • Stock exhaust diameter question

    I know it is 2.25" but is that I.D or O.D?

  • #2
    Re: Stock exhaust diameter question

    It's 2.25 through, why are you asking that would help to answer your question

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    • #3
      Re: Stock exhaust diameter question

      I got a 3" over the axle pipe and Dynomax super turbo and I was thinking of clamping the over the axle pipe to the stock exhaust and I couldnt figure out if it was 2.25 I.D or O.D. But Im just going to have an exhaust shop weld it together for me.

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      • #4
        Re: Stock exhaust diameter question

        If I were you I'd go 3' from the cat to the tips, the transition from 2.25 to 3 is a big difference when it comes to flow so I'd recommend going 3 all the way

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        • #5
          Re: Stock exhaust diameter question

          Originally posted by Brians00Blackbird View Post
          If I were you I'd go 3' from the cat to the tips, the transition from 2.25 to 3 is a big difference when it comes to flow so I'd recommend going 3 all the way
          That's what I did, except it is 2.5" from the muffler to the dual tips. 3" from the cat (including both sides of the cat) to the muffler.

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          • #6
            Re: Stock exhaust diameter question

            If you were to get headers you can go 2.5" from the headers to a 3" Y pipe then 3" all the way back.
            08' L76 6.0L 4X4 Chevy EXT.Cab LTZ Vortec MAX with Snug top cover, Dynomax exhaust,Hptuners& K&N intake
            96' Camaro M5 to A4 conversion, alot of mods . GT35R Turbo full suspension. Built engine

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