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exhaust help

This is a discussion on exhaust help within the GTO forums, part of the Vehicle Specific category; i have slp exhaust just the mufflers what can i do to increase the sound and horse power at same ...

  1. #1
    Junior Member Evil Goat's Avatar
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    exhaust help

    i have slp exhaust just the mufflers what can i do to increase the sound and horse power at same time...what can happen if i remove cats

  2. #2
    Member Tide's Avatar
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    Nothing special
    Nothing special

    Sound is subjective (taste).

    Any number of things can be done: Headers, swapping the stock H pipe for an aftermarket H or X Pipe, new mufflers/catback, but it gets a bit expensive.

    I don't care what anybody (or any marketing department) says: Catbacks and mufflers don't add any noticable horsepower, 3-5 horsepower at the most. I've found that most of your restriction is in your headers and h pipe. Futher, newer cars that undergo a significant exhaust change can actually lose power because the stock tuning doesn't correctly adjust for it. The factory tuning was such that it was set with a certain amount of back pressure.

    If you go the offroad H or X pipe route (without cats), you'll need to get the MIL Eliminators to stop your CE light from coming on.

    I would suggest long tube headers, offroad H pipe, and an aftermarket catback. If you go with the H pipe, make sure you get chambered mufflers (a la Flowmaster). If you go with the X pipe, straight through mufflers (a la Magnaflow) are the best match. Again, sound is subjective, but chambered mufflers with an X pipe sounds like complete ass, IMHO. It sounds blatty, obnoxious, like an old Ford pickup thats running headers only.

    I can't stress enough that if you DO a header/midpipe/catback swap, to get it tuned for it. A custom tuner will be able to set your car up right, and you won't need the MIL's.

    For an exhaust 'done right', you're looking at about $2,000 bucks, if you install it yourself.

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    ^^^^^ well said. A great very cheap option is always a electronic cutout. Will make the car louder, and add a few to several hp depending on location.

  4. #4
    Junior Member Evil Goat's Avatar
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    where can i get these at for cheap

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    a cutout can be found from one of our sponsors such as thunder racing

    http://www.thunderracing.com/catalog...vid=3&pcid=101

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