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Thread: Aww, The Sound

  1. #1
    Member Fearls1's Avatar
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    Verdigris, OK
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    MRM
    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?

  2. #2
    Junior Member
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    Jan 2008
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    ottawa
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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
    2000

    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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    St. Louis MO.
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    Black
    00 Trans Am/Auto

    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
    Semi Retired Street Racer
    2012 Lava Red Mustang GT Coupe Brembo/3.73's
    Build Date 3/17/11, Last Lava Red GT

    Gone but not forgoten
    NBM `98 Formula M6 HdTp
    1 of 1 Build Date 3/12/98

  6. #6
    War Machine BIG GUNS's Avatar
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    Black
    00 Trans Am/Auto

    What a dilema.

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