Is the exhaust layout identical per the 1983 and 1984 DeVille 4.1 V8
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HT4100 4.1, 4.5, 4.9 Discussion, Is the exhaust layout identical per the 1983 and 1984 DeVille 4.1 V8 in Cadillac Engine Technical Discussion; Mainly in the exhaust manifold flange -> downpipe -> cat region. Thanks in advance, CT...
  1. #1
    SolidGoldsteen's Avatar
    SolidGoldsteen is offline Cadillac Owners Fanatic
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    Is the exhaust layout identical per the 1983 and 1984 DeVille 4.1 V8

    Mainly in the exhaust manifold flange -> downpipe -> cat region.

    Thanks in advance,
    CT

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  3. #2
    El Dobro's Avatar
    El Dobro is offline Cadillac Owners Connoisseur
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    Re: Is the exhaust layout identical per the 1983 and 1984 DeVille 4.1 V8

    The crossover pipe (which is discontinued from GM) has the same part number, but the rest has different numbers.

  4. #3
    SolidGoldsteen's Avatar
    SolidGoldsteen is offline Cadillac Owners Fanatic
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    Re: Is the exhaust layout identical per the 1983 and 1984 DeVille 4.1 V8

    Thanks

    Do you know if the crossover pipe and pass. side downpip flanges are anything special where it meets the manifold. I'm thinking I want the muffler shop to just use the 3" Stainless I had them order for these pipes; Unless the flanges are a problem.

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