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GMMG vs Magnaflow

This is a discussion on GMMG vs Magnaflow within the External Engine forums, part of the LSx Technical Help Section category; Okay when i get the money saved up i plan to first put a new catback on my next trans ...

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    GMMG vs Magnaflow

    Okay when i get the money saved up i plan to first put a new catback on my next trans am. Ive narrowed it down to magnaflow and GMMG. I know the gmmg costs much more but dont know if its really worth the extra money in performance or sound. Any opinions from anyone whos heard these in person?

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    Veteran 0rion's Avatar
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    The GMMG is incredible in the sound dept. If you ever heard one in person you would know what I'm talking about. I wish that would've been the catback I went with.

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    Slow'er'Ass Mr. Luos's Avatar
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    I have a friend that might be looking to sell his GMMG. Too loud and it rasps pretty bad now. But that is on a blown car, no cats, and longtubes.
    I will never go against Magnaflow. My favorite exhaust for the LSx cars.

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    GMMG sounds great until you put long tubes on the car. Then it sound like garbage, just like SLP LM with long tubes.

    If you're never going to get headers or an ORY, then the GMMG is good. But if you're planning on getting longtubes or deleting your cats, go with the Magnaflow for sure.

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    Ya thats what i was worried about with gmmg, that raspy sound. I do plan to get longtubes so magnaflow seems the better choice then. Does anyones one know what the difference in sound level is with the magnaflow if i go with no cats or a catted Y? assuming i already have longtubes on it

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    Quote Originally Posted by Mr. Luos View Post
    I have a friend that might be looking to sell his GMMG. Too loud and it rasps pretty bad now. But that is on a blown car, no cats, and longtubes.
    I will never go against Magnaflow. My favorite exhaust for the LSx cars.
    I personally thought dans was uber amazing when he floored it in the tunnels. I couldn't even hear my self think. lmao

    Go GMMG unless you go with longtubes and plan to delete the cats. Otherwise I would go with Corsa, way better sound than magnaflow, IMO.

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    Senior Member Zboner's Avatar
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    go with corsa

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    Rollo Tomassee AKIRA's Avatar
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    EGHGHGHGHGHGHGHGHGHHHHHH! Corsa is prolly the biggest waste of money. All youre buying is looks.

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    Double Tap Heartbreak1's Avatar
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    Quote Originally Posted by AKIRA View Post
    EGHGHGHGHGHGHGHGHGHHHHHH! Corsa is prolly the biggest waste of money. All youre buying is looks.
    Looks an a sound that can't be matched or beat. Sorry but after listening to Corsa on my dads vette and a buddies T/A, I can comfortably say that its THE best system out there.

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    Rollo Tomassee AKIRA's Avatar
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    Quote Originally Posted by Vertibird54 View Post
    Looks an a sound that can't be matched or beat. Sorry but after listening to Corsa on my dads vette and a buddies T/A, I can comfortably say that its THE best system out there.
    Bias

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    Senior Member Zboner's Avatar
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    Quote Originally Posted by Vertibird54 View Post
    Looks an a sound that can't be matched or beat. Sorry but after listening to Corsa on my dads vette and a buddies T/A, I can comfortably say that its THE best system out there.

    I agree 100%

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    Rollo Tomassee AKIRA's Avatar
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    How much are they $700 or $800? Its been so long since Ive discussed this catback. Since before ls1.com took a dump, actually.

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    Double Tap Heartbreak1's Avatar
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    Quote Originally Posted by AKIRA View Post
    How much are they $700 or $800? Its been so long since Ive discussed this catback. Since before ls1.com took a dump, actually.
    First of all, its your opinion if you don't like it, but don't bash me for mine or someone elses. So let off some steam before you start going ape on us. Second, GMMG is around the same damn price I haven't heard you once say anything about it. I personally like both the GMMG and Corsa simply because they both have their own unique sound. I would personally go Corsa over the GMMG system tho simply because it looks better and its not as common to see it on our cars like the GMMG is.

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    Double Tap Heartbreak1's Avatar
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    Quote Originally Posted by AKIRA View Post
    Bias
    Simply because my dad has the system does not mean I have bias. I personally think Borla Stinger sounds better on Vettes but Corsa would be my second choice.

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    Slow'er'Ass Mr. Luos's Avatar
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    I still stand by Magnaflow.

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    Double Tap Heartbreak1's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    I still stand by Magnaflow.
    Theres a difference tho, your using the bullet style which sounds a hell of alot better vs. their lousy catback.

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    Slow'er'Ass Mr. Luos's Avatar
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    Catback sounds just as good to me.
    Tips need help, but that isn't a big deal.

    I also can't see spending anything over $500 on a catback.
    Corsa/Borla/GMMG = $750'ish'
    Magnaflow and Pacesetters = $900'ish'

    I am too much of a performance guy to spend that much on a catback alone.

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    Senior Member Zboner's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    Catback sounds just as good to me.
    Tips need help, but that isn't a big deal.

    I also can't see spending anything over $500 on a catback.
    Corsa/Borla/GMMG = $750'ish'
    Magnaflow and Pacesetters = $900'ish'

    I am too much of a performance guy to spend that much on a catback alone.

    thats why i buy mine used, hell there all made of stainless and have a lifetime wattenty, and can pick up a good one for about 400 on Tech

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    Double Tap Heartbreak1's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    Catback sounds just as good to me.
    Tips need help, but that isn't a big deal.

    I also can't see spending anything over $500 on a catback.
    Corsa/Borla/GMMG = $750'ish'
    Magnaflow and Pacesetters = $900'ish'

    I am too much of a performance guy to spend that much on a catback alone.
    Pacesetters, High Flows, TrueDuals = $900+install

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