eta exhaust quandry

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  • RainierHooker
    R3VLimited
    • Jul 2009
    • 2026

    #1

    eta exhaust quandry

    Well, now that I've got my eta sitting right, the next step is to get it to sound right. Since no one seems to make a cat-back for an eta I've resolved myself to building up a 'kustom' system and am in the process of narrowing down my options.
    I plan on using the stock manifolds and Y-pipe (it's an eta, lets not get silly) so the initial tube diameter is 2.25". I'm also pretty sure that my cat is focked, and since I am now emmissions exempt, I plan on pulling the cat and replacing it with a resonator or possably going with a universal magnaflow cat. From that point back I have narrowed it down to these options:
    1. 2.5" stainless to Borla Turbo 40980 single in single out muffler
    2. 2.25" stainless to Magnaflow 14815 single in double out muffler

    I am looking for a DD'able, but deep and distinctive sound note. I don't want to set off alarms, but I want people to know its me driving up before they see me pull the car around. Does anyone here have any experience with these or similar set-ups?
    I have looked and searched, but have been unable to find much in the way of eta exhaust options. Sound clips or other tips/suggestions would be most appreciated.

    PS: Sorry for the wall of text...

    1984 Hennarot 325e - 1990 Brillantrot M3 - 1938 Buick Special Business Coupe
  • MattsBMWs
    Noobie
    • Jun 2009
    • 39

    #2
    Bump for fellow ETA owner! I'm looking for about the same, I just don't want to have a ton of in car drone at cruise. I know that can easily happen since ETAs cruise in the lower RPM range.

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    • Van Westervelt
      R3V OG
      • May 2006
      • 9365

      #3
      Supersprint made a free flow box for the Etas.
      sigpic

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      • e34john
        No R3VLimiter
        • Apr 2006
        • 3599

        #4
        Get the Borla and let us know how it works out. I can get a Borla for cheap but I'm having trouble finding an E30 running one.
        sigpic

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        • Z3Jonathan
          Wrencher
          • Oct 2003
          • 289

          #5
          I just had a buddy of mine fab up a 2.25" stainless steel exhaust, using a 12" Vibrant Racing "bottle" resonator and a Magnaflow 14815 muffler. Honestly, it drones a bit at 2000-3000 RPM (ie highway speed). I'm going to see if settles down as the muffler breaks in. Other than the drone, I really love the sound. It's actually really quiet at idle, and overall has a smooth but deep tone to it.

          If not, I may add another resonator, or try a larger muffler (??).

          Originally I ordered a Vibrant Racing "Super Quiet" resonator, but it was way too large to fit where the stock pancake resonator sits.

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