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Aww, The Sound

This is a discussion on Aww, The Sound within the Firebird / WS6 forums, part of the Vehicle Specific category; I have a crappy flowmaster muffler that is now falling apart from the inside... but at around 3,300-3,400 w/AC, I ...

  1. #1
    Member Fearls1's Avatar
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    2002 T/A M6

    Aww, The Sound

    I have a crappy flowmaster muffler that is now falling apart from the inside... but at around 3,300-3,400 w/AC, I get this amazing tone from it. It won't howl like that if the AC is off. Question though, I've been looking around here and can't find what the stock diameter of the exhaust pipes from cat back should be. I'm the second owner and have done nothing as far as exhaust goes, but I looks to me that there is 3" pipes under there. Anybody know?

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    red
    1998 pontiac transam ws6

    yeah i think they are 3".. im about 99.9% on that

  3. #3
    🤔 11s. blackbirdbrain89's Avatar
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    black trans am
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    idk i think its 2.5 stock but all the cat back kits are 3 inch

  4. #4
    War Machine BIG GUNS's Avatar
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    Yeah, maybe stock 2.5 but, you may have to get a micrometer and find out the diameter with that first before ordering anything.

    I suggest the Magnaflow. I love that muffler way better than the Flow Master that I had. Sounds way better.

  5. #5
    Firebird Encyclopedia 9T8W66's Avatar
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    Navy Blue Metallic
    `98 Formula M6 HdTp

    Stock Intermediate pipes are 2.75"
    Craig
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  6. #6
    War Machine BIG GUNS's Avatar
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    What a dilema.

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