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'84 2+2 test pipe?

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  • '84 2+2 test pipe?

    1975 Datsun 280Z
    1988 300ZX (NAtoT soon)
    2006 Kawasaki ZX6R

  • #2
    just out of curiosity is there any power difference between the test pipe and a high flow cat.


    • #3
      I don't recall seeing anyone posting back to back runs showing the gains/losses on a z31.
      *It is fact, that the gains are very small when swapping from a std. cat to a high flow cat. converter.
      **It is also fact, that cars in modified trim, typically see a gain of ONLY 4-5% in Hp. from using a test pipe instead of any cat. converter.

      I am here to help...


      • #4
        A long time ago someone dynoed an 8hp difference on a NA car with an existing aftermarket cat-back exhaust.

        The cat is the same length on 2 seat and 2+2 models. Only the length of the piping behind the cat is different, by about 8 inches. You can either extend your test pipe or put another small section of pipe with two MORE flanges behind it.


        • #5
          i agree the flow-ness of a stock cat is probably not that restrictive, however a "22 year old" stock cat is not going to be flowing like it used`ta could.

          Exercising my constitutional right to be awesome

          1.5.2. Podium winning cars do NOT need to be running at the checkered flag
          good thing....