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Gmmg

This is a discussion on Gmmg within the External Engine forums, part of the LSx Technical Help Section category; Does the GMMG exhaust have the same problem with high rpm raspiness like SLP's loudmouth does when you have headers, ...

  1. #1
    Army Grunt predator506's Avatar
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    Mystique Teal
    1999 Camaro Z28

    Gmmg

    Does the GMMG exhaust have the same problem with high rpm raspiness like SLP's loudmouth does when you have headers, ory and no cats. I found some clips on ls1 sounds but I couldn't really tell. I had the loudmouth and I wanted to keep it loud but get rid of the raspiness so I swapped the resonator for a spiral flow bullet but that made my car a lot quieter and thats not what I'm looking for. What do you guys think?

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    Just me Y2KPewterSS's Avatar
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    Pewter metallic
    2000 Camaro SS

    Its not as bad as the Loudmouth, but there is still some rasp around 2400-2600 RPMs.
    CCW SP 500s 18x10 275/35 18x11 295/35
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    I'd rather be bi than full homo!!!!

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    I lika da Chevy's LETHALxLS1's Avatar
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    Get a BORLA XR-1 5" round and you will have a Borlamouth. No drone or rasp like the LM resonator - XR-1 has a deep sound and I believe you will be happy with it.

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    No Compromise davered00ss's Avatar
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    2000 Camaro SS

    The GMMG has rasp once you add heads. Big cubes it kind of sounds like shit to me.

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    Member jd2002ss's Avatar
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    I have long tube headers (Kooks), with cats, and a GMMG catback. It does develop a raspy sound at excelleration for a second or two then goes away. Can anybody tell me how a rasp sound develops in an exhaust system? What does it take to prevent it?

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    I lika da Chevy's LETHALxLS1's Avatar
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    A new muffler hahahaha

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    Veteran 0rion's Avatar
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    moving to the external section

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    Member SpeedWorld's Avatar
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    I have GMMG, longtubes, no cats and I dont notice much rasp at all. I think it sounds badass. It is definitely one of the best setups I have heard. Only has minor drone 2k rpms.
    2001 Chevrolet Camaro SS M6
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    Junior Member camaro6662's Avatar
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    Bright Rally Red
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    Quote Originally Posted by davered00ss View Post
    The GMMG has rasp once you add heads. Big cubes it kind of sounds like shit to me.
    Sounds like the sweetest music I ever heard

    I do have a GMMG Camaro SS 35th Performance Edition Phase II 500hp

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    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    Quote Originally Posted by camaro6662 View Post
    Sounds like the sweetest music I ever heard

    I do have a GMMG Camaro SS 35th Performance Edition Phase II 500hp
    Well then, you better go to the Camaro section and posts pics cause me and a bunch of peeps want to see it!!!

  11. #11
    I lika da Chevy's LETHALxLS1's Avatar
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    ^ ditto

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    Junior Member camaro6662's Avatar
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    Bright Rally Red
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    I lika da Chevy's LETHALxLS1's Avatar
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    link is fked up

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    Member SpeedWorld's Avatar
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    Link worked for me. Nice ride!

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    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    Quote Originally Posted by camaro6662 View Post
    DIDn't Work!

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    I lika da Chevy's LETHALxLS1's Avatar
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  17. #17
    T/A Everyday oreowizard's Avatar
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    Quote Originally Posted by LETHALxLS1 View Post
    Get a BORLA XR-1 5" round and you will have a Borlamouth. No drone or rasp like the LM resonator - XR-1 has a deep sound and I believe you will be happy with it.
    I've seen that you promote this pipe on more than one thread. How much are they and where can I get them. I want a good deep sound that can be heard under acceleration. I will soon be adding Headers and catted Y. Thanks
    Last edited by oreowizard; 12-01-2007 at 10:00 AM. Reason: spelling

  18. #18
    T/A Everyday oreowizard's Avatar
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    I also want to turn heads when I get on it.. Kinda like a "look at me, Im loud" LOL. But dont want it all the time

  19. #19
    I lika da Chevy's LETHALxLS1's Avatar
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    I know I promote the Borla XR-1 ALOT but its only because it saved me from having to buy a new catback exhaust when I bought the LM1. The LM1 made my car sound like a dump truck with no muffler. I couldnt even give the car moderate throttle without it being so loud everyone was looking like WTF??? With the Borla XR-1 in place of the LM resonator it is the perfect sound (deep,growling sound) with no rasp/drone. At normal throttle it can be heard but isnt too loud(you can still hear the radio). Get on the throttle moderately to heavy and it gets plenty loud for me. I will send you a PM on the cheapest place to buy it.

  20. #20
    T/A Everyday oreowizard's Avatar
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    PM received, PM replied

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