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Thread: magnaflow round muffler question

  1. #1
    Garrett booster
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    magnaflow round muffler question

    how quiet is a magnaflow round muffler for a side exit? i have a glasspack and am looking for something quieter.

    thanks

  2. #2
    turbo addict
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    Re: magnaflow round muffler question

    I don't know about a side exit but my 3" mandrel bent pipe out the back with it right at the rear is pretty quiet with nothing but the dynomax quieting it down.

  3. #3
    Garrett booster Turbo Mopar Contributor
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    Re: magnaflow round muffler question

    3" with a Magnaflow out the side here. I don't think it is that loud at all.
    85 Shelby Charger Commonblock T-II, GT3076, TU Cast Header, 3" SV, TU R-2 Plus Billet Cam, TU Custom Calibration

  4. #4
    Hybrid booster
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    Re: magnaflow round muffler question

    I've got the magnaflow 2.5" round out the back and it is not horribly loud much better tone than a glass pack also.
    KO, 86 T&C Turbo II 89 Daytona Shelby 84 Stingray SVB165SS

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    Moderator Turbo Mopar Staff Force Fed Mopar's Avatar
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    Re: magnaflow round muffler question

    I am starting to really hate my glasspack side exit also Anybody have some good sound/video clips of the magnaflow? Either side exit or rear exit.
    Rob M.
    '89 Turbo GTC

    2.5 TIII stroker, 568 w/ OBX and 3.77 FD

  6. #6

    Re: magnaflow round muffler question

    I have a Dynomax 3" with side exit exhaust and its surprisingly quiet and deep for being on a 4cyl. Not at all like your typical Autozone accessorized honda.

  7. #7
    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    Re: magnaflow round muffler question

    What turbo? A stock turbo won't be that bad but anything larger, especially with a .63 housing and stage II wheel will alot louder.
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  8. #8

    Re: magnaflow round muffler question

    I run a GN turbo on mine, its not bad.

  9. #9
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    Re: magnaflow round muffler question

    mine is a .63/stg1 wheel, ported wastegate, with an Automatic which are usually louder than 5spds. It's still a nice deep fairly quiet tone.

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    Re: magnaflow round muffler question

    Mine isn't really that loud, I just don't like the tone, and it's right in my ear all the time
    Rob M.
    '89 Turbo GTC

    2.5 TIII stroker, 568 w/ OBX and 3.77 FD

  11. #11
    Garrett booster
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    Re: magnaflow round muffler question

    if it is more quiet than what i have now then i'll go with a magnaflow. i'm going to be using this vehicle as a DD soon and i head to work at 5:30 am. i don't want to anger up the neighboors too much .

  12. #12
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    Re: magnaflow round muffler question

    glass packs from what I've heard are loud and crackly. The magnaflow produces a nice deep tone in 2.5" and 3" sizes. I leave for work at 6:30am and have to drive within 3ft of my neighbors house since our driveway is on an easement. Haven't heard any complaints yet. Of course it's probably much better for them since it was 3" straight pipe

    this is pretty much what it sounds like tone wise. The volume doesn't change much when you rev it up. It's not a magnalfow in the video but it's the same design and functions the same. My buddy put that muffler on his shadow in the center tunnel and exits out the back. I went with the 3" 6" round magnalfow from TU and my new yorker is quieter than his shadow even though his muffler pipe is a side entrance and center exit while the Mag is a center/center setup. Both cars have a nice deep fairly quiet tone. His just has a little bit of a crackle to it.


  13. #13
    Hybrid booster
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    Re: magnaflow round muffler question

    my Convertible with the 3" is quieter than the CSX with the 2.5" magnaflow, both running a S60 turbo and a 2.5. But you always hear that 3" is the most noisy, 2.5" wails at WOT.

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    Moderator Turbo Mopar Staff Force Fed Mopar's Avatar
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    Re: magnaflow round muffler question

    My 2.5" w/ a glasspack sounds like a jet engine under heavy pedal.
    Rob M.
    '89 Turbo GTC

    2.5 TIII stroker, 568 w/ OBX and 3.77 FD

  15. #15
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    Re: magnaflow round muffler question

    Check this out, a built in muffler check valve, going to get one and try it. I think it has a 90 day money back guarantee-

    Its the first muffler, VT.

    http://www.dynomax.com/mufflers.php
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
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    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
    2004 GSW TDI, 5 speed, fully loaded, modified.

    Aurora ignition wires for sale. Link to info

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  16. #16
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    Re: magnaflow round muffler question

    Quote Originally Posted by Force Fed Mopar View Post
    My 2.5" w/ a glasspack sounds like a jet engine under heavy pedal.
    That's because it's super restrictive. Restriction makes that jet sound.

  17. #17
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    Re: magnaflow round muffler question

    Quote Originally Posted by turbovanman View Post
    Check this out, a built in muffler check valve, going to get one and try it. I think it has a 90 day money back guarantee-

    Its the first muffler, VT.

    http://www.dynomax.com/mufflers.php
    Cool idea, I have a feeling that valve would freeze up after a year or so though. Maybe not though, if it's made right. It's essentially like a heat riser that used to be made into the manifold on carbed engines to warm the engine up faster. Many of those worked fine for years, so maybe that muffler will too.

    Quote Originally Posted by GLHNSLHT2 View Post
    That's because it's super restrictive. Restriction makes that jet sound.
    I was afraid someone was gonna say that I've been wanting to replace it anyway. I have some old 3" Dynomax race bullet header mufflers off a Mustang that have been hanging around useless for a while, maybe I'll hack the turn-downs and header flanges off and try one of those
    Rob M.
    '89 Turbo GTC

    2.5 TIII stroker, 568 w/ OBX and 3.77 FD

  18. #18
    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    Re: magnaflow round muffler question

    Quote Originally Posted by Force Fed Mopar View Post
    Cool idea, I have a feeling that valve would freeze up after a year or so though. Maybe not though, if it's made right. It's essentially like a heat riser that used to be made into the manifold on carbed engines to warm the engine up faster. Many of those worked fine for years, so maybe that muffler will too.
    You never know, I guess I'll find out. If my new setup is still droning, I'll buy one.
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
    1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
    2004 GSW TDI, 5 speed, fully loaded, modified.

    Aurora ignition wires for sale. Link to info

    Super60 roller cams or custom/billet cams. Link to info

  19. #19
    Moderator Turbo Mopar Staff Force Fed Mopar's Avatar
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    Re: magnaflow round muffler question

    Quote Originally Posted by turbovanman View Post
    You never know, I guess I'll find out. If my new setup is still droning, I'll buy one.
    Yeah, it'd be interesting if you could figure out a way to check how much backpressure or flow is required to open the valve. Or maybe you can call and ask them?
    Rob M.
    '89 Turbo GTC

    2.5 TIII stroker, 568 w/ OBX and 3.77 FD

  20. #20
    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    Re: magnaflow round muffler question

    Quote Originally Posted by Force Fed Mopar View Post
    Yeah, it'd be interesting if you could figure out a way to check how much backpressure or flow is required to open the valve. Or maybe you can call and ask them?
    I might call them anyhow and post up what they say.
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
    1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
    2004 GSW TDI, 5 speed, fully loaded, modified.

    Aurora ignition wires for sale. Link to info

    Super60 roller cams or custom/billet cams. Link to info

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