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  1. #1
    Member
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    Feb 2008
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    PEWTER
    2001 TRANS AM WS6

    Need help with cat back

    Well this is the 4th time I will be getting my Corsa muffler welded Im thinking about the lm2 but its only a 2and 1/2 inch pipe and my corsa is 3 or 3and1/2 will the lm2 be a power cork down the road should I look for a 4inch or 3 or 3-1/2.

  2. #2
    11 years of bangin gears cammed goat's Avatar
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    North Jersey
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    11,496

    Phantom Black Metallic
    2004 GTO M6

    IMO downgrading in pipe diameter will cause a restriction.

  3. #3
    Member
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    PEWTER
    2001 TRANS AM WS6

    Yeah but the lm2 is not the same type of muffler its like a bullet

  4. #4
    Just a farmboy V8MUSCLE's Avatar
    Join Date
    Jun 2007
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    Montpelier, VA
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    37
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    521

    Pewter
    2000 Pontiac Trans Am

    too big a pipe can hurt you the same as too small a pipe.

    if you have a 1 inch pipe you will be trying to cram all that hot gas out a itty bitty pipe.

    3 inch is more than enough unless your trying to get in the 10-11's

    with each exhaust stroke your piston is pushing all the air out of your cylinder and exhaust. if its say 8 inch diameter, the hot not so dense gasses will have time to cool and become cooler more dense gas, so you will be pushing more weight from the cooler heavier gas out robbing power.

  5. #5
    Slow'er'Ass Mr. Luos's Avatar
    Join Date
    Aug 2005
    Location
    Thornton, CO
    Posts
    23,773

    Red Tint Jewelcoat
    2008 Trailblazer SS

    3 inch Magnaflow catback.

    $400
    2008 Trailblazer SS
    Yank PTB3600, Kooks 1 7/8" LT's, 4" intake, E-fans, Magnaflow, Sonnax kit, tranny cooler, tune.
    Lowered, HID's, tinted.

    1999 Pontiac Trans Am WS.6 #1747 SOLD
    531.1 RWHP 481.3 FT/Pounds all motor.

  6. #6
    Member masterZ28's Avatar
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    Apr 2007
    Location
    ontario, ca
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    112

    Black
    2000 Camaro Z28

    its a bullet should be fine.

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