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Thread: Longtubes+stock muffler,restrictive?

  1. 04-11-2010 09:44 PM #1
    vista4.8's Avatar
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    Longtubes+stock muffler,restrictive?

    I want to know what yall think about that setup. I'm thinking it is restrictive, or at least it feels like it is. Any input?

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  2. 04-11-2010 09:54 PM #2
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    The stock muffler is going to restrict it completely. The longtubes can't flow any faster than the muffler lets it.

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  3. 04-11-2010 10:23 PM #3
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    The stock muffler is less restrictive than a Flowmaster so I dont think you are losing much.
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  4. 04-11-2010 10:52 PM #4
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    Quote Originally Posted by jake_03 View Post
    The stock muffler is less restrictive than a Flowmaster so I dont think you are losing much.
    I cant agree with that because Ive seen the inside of a stock muffler and they LOOK very restrictive compared to a flow
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  5. 04-11-2010 11:03 PM #5
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    I saw a dyno test on a 5.3 were they replaced the stock muffler with a flowmaster and lost 3rwhp,cut that off and welded up a Magnaflow and picked up 9rwhp over stock,12 hp over flowmaster.
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  6. 04-12-2010 07:24 AM #6
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    Then i guess its time for another magnaflow, The only reason i run stock is because its quiet.
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  7. 04-12-2010 07:34 AM #7
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    try spin tech they r way quiet at an idle i have a stock stall so at idle i sound stock and its dumpped but when u launch on it she gets pretty loud

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  8. 04-12-2010 10:40 AM #8
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    Quote Originally Posted by jake_03 View Post
    I saw a dyno test on a 5.3 were they replaced the stock muffler with a flowmaster and lost 3rwhp,cut that off and welded up a Magnaflow and picked up 9rwhp over stock,12 hp over flowmaster.
    Yea and I saw the tornado make 15 more hp on the dyno to lol.
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  9. 04-12-2010 10:54 AM #9
    sprayedenali
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    just get a big magnaflow, itll be plenty quiet
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  10. 04-12-2010 07:56 PM #10
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    Quote Originally Posted by sprayedenali View Post
    just get a big magnaflow, itll be plenty quiet
    +1 thats what ima bout to do..
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