Cat-back Or Axle Back ?

Discussion in '2005 - 2009 Specific Tech' started by Chuck Venit, Feb 3, 2014.


  1. Chuck Venit

    Chuck Venit Member

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    Cat-back or Axle-back which one is the better bang for the buck? I am just starting out on a n 09 with 17000 miles. It is destined to be a cruiser/show car. Opinions?
  2. timjimmy

    timjimmy Active Member

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    Cat back is unnecessary unless you simply want a better appearance. Factory mid-pipes flow just fine.
  3. Bullitt95

    Bullitt95 Active Member

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    Neither. The stock midpipes behind the cats aren't restrictive, and you'd be lucky to gain more than 3hp from aftermarket axlebacks.
    There are only two exhaust mods that are worth any meaningful HP gains. One of them is LT headers (16hp) but since the cost of the headers/shorty midpipe is at least $750 and installation costs another $600 (6 hours labor), that's over $80 per hp. The other is a standard length offroad midpipe keeping the stock headers & catbacks. At $200 for an 8hp gain, this is much more worthwhile and installation takes less than an hour but your state may not allow it.
  4. arcwcb

    arcwcb Member

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    I agree with the above posts. If you're after power only, don't worry about the exhaust. If you're after sound, axle back is all you'll need.
  5. timjimmy

    timjimmy Active Member

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    As for the of road mid-pipe, removal of the catalytic converter requires a tune or the check engine light will trigger and remain on.
  6. Bullitt95

    Bullitt95 Active Member

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    I'd be more concerned about the Smog Gestapo.
  7. earleys94gt

    earleys94gt Active Member

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    Put on an axle-back, for some added sound, and enjoy it!
  8. timjimmy

    timjimmy Active Member

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    [quotett95, post: 8797934, member: 124999"]I'd be more concerned about the Smog Gestapo.[/quote]
    True, I wouldn't do it if my state laws required emissions testing.

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