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  • THis worth it?

    I was thinking of putting 3-inch pipping on when i get headers, but my american thunder cat is only a 2.5. Would it be worth the trouble putting 3-inch up to the cat?

    Iam looking mostly for the sound, but i know it will help on top end alot.
    1999 Pontiac Trans Am M6 Far from stock.....
    Pics http://rides.webshots.com/album/5599...Dk?vhost=rides

  • #2
    I would not recommend 3inch. I noticed a considerable drop in low end from 2.25" to 2.5"
    It will sound great with headers, but IMO performance will suffer. Stay with 2.5" unless you're going with power adders such as nitrous or sc.
    -Eric<br />2002 Navy Blue Camaro...Striped and Stalled. 35th Anniversary SS wheels <br />Best ET: 15.384 @ 88.32 on street tires<br />Project Whitney: Goal, 14.0 1/4 by summer 2008.

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    • #3
      isn't 2.25 stock? Or em i wrong and its 2.50?
      1999 Pontiac Trans Am M6 Far from stock.....
      Pics http://rides.webshots.com/album/5599...Dk?vhost=rides

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      • #4
        Stock is 2.25"
        <b>99 Camaro Z28 A4</b><br />R.I.P. 00 Firebird 3.8<br />14.89 @ 90, 2.03 60\'

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