Exhaust gasket replacement

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  • Flaggo60
    • Feb 2026

    #1

    Exhaust gasket replacement

    I recently removed, refinished and replaced my MAC 4-1 system. There were copper crush gaskets in there that I reused. They were crushed where the pipes contacted but other than that appeared to be OK. Should I be reordering new ones anyway, any opinions?
  • Nessism
    Forum LongTimer
    GSResource Superstar
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    • Mar 2006
    • 35788
    • Torrance, CA

    #2
    If they seal you are good. If not, get new ones.
    Ed

    To measure is to know.

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    • bwringer
      Forum LongTimer
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      • Oct 2003
      • 17066
      • Indianapolis

      #3
      You can usually re-use them a time or two, but you're supposed to replace them every time.

      So if you don't replace them, you take a chance of one or more leaking, and the chance increases the more times they've been used.

      Fortunately, an exhaust leak from a crushed-too-many-times crush gasket isn't one of life's more serious problems. It just makes a little ticking noise, but won't really hurt anything. If you've got somewhere to be, go anyway.

      I always try to keep some of these gaskets "in stock".

      The Suzuki exhaust gaskets are sort of a paper-ish stuff with steel around the outside and inside, but the copper ones work OK with aftermarket exhausts.

      The copper gaskets aren't thick enough with a stock exhaust -- guess how I learned this...
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      • Flaggo60

        #4
        Thanks folks-I guess I'll leave them in place 'til I know better.

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        • Guest

          #5
          I've reused mine MANY times. No leaks

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