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how much quieter will it be?

This is a discussion on how much quieter will it be? within the External Engine forums, part of the LSx Technical Help Section category; i have to get cats put on my true dual setup, i moved to GA and i ave to get ...

  1. #1
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    how much quieter will it be?

    i have to get cats put on my true dual setup, i moved to GA and i ave to get em on for inspection cuz they wont even testme until i get em on. im gonna put some SLP high flow ones on there, how much power will i lose and what is the sound diferrence gonna be?

    i have true dual H pipe going into 2.5" piping to single chamber flowmasters.

  2. #2
    JUISSED Midnight02's Avatar
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    Navy Blue Metallic
    2002 Camaro SS

    You should notice a pretty decent change in the overall "volume" of the exhaust. The tone should still be pretty similar, just not quite as loud.

    That being said, there are plenty of emissions shops in Georgia that don't do a visual inspection. As long as the ECM isn't throwing a code, you will pass without much trouble at many places.

  3. #3
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    i know but i have a code thrown sayin somtin bout the secondary air induction, and thats whati took it to the shop, where could i take it to get it fixed? there is no cat code bein thrownc uz i have sims, and the shop wont even fix the secondaryair prob until i take it to the muffler shop they claimed.

  4. #4
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    wouldnt it be worht it to just buy a tuner and tune the codes out and take it to a place that wont put it ion a lift to test it?

  5. #5
    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    it's secondary air injection. What code is it? Probably just a stuck check valve. Easy fix. $20 for a new one or you could try cleaning the old one. Need the code to know what side it's on.

  6. #6
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    SILVER
    2004 CTS-V

    loss of 5 hp w/ cats. Put an X-pipe on there and gain back what you will loose

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