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TSP Rumbler vs. GMMG clones : opinions?

This is a discussion on TSP Rumbler vs. GMMG clones : opinions? within the External Engine forums, part of the LSx Technical Help Section category; thanks to help from everyone in previous posts, i've pretty much narrowed down my tone search to two these two ...

  1. #1
    Junior Member 99superhawk's Avatar
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    Arctic White
    1999 Trans Am

    TSP Rumbler vs. GMMG clones : opinions?

    thanks to help from everyone in previous posts, i've pretty much narrowed down my tone search to two these two setups. i really like the GMMG...but i refuse to pay that much for the original system. i figure i could take a picture of the cat back to a shop, and have them fab a custom one for me for a fraction of the cost.

    if i decide to do this...are power sticks the best mufflers to go with? i'd like to get as close to the original sound as possible. what brand/type is best...and also, what length would i want?

    on the other hand, the TSP rumbler seems to be getting a good bit of positive feedback. it sounds decent to me. are there any negative stories i should hear to warn me against it?

    all opinions, biased or not, are welcome. i'd love to hear what everyone thinks of these ideas, and maybe which one would be better overall.

    by the way, i'm running a completely stock '99 T/A, stock manifolds, stock Y, and no plans to change them for a while.

    thanks all (sorry this was so long). cheers.

  2. #2
    Junior Member 99superhawk's Avatar
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    Arctic White
    1999 Trans Am

    some opinions perhaps?

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    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    the gmmg is by far the best catback I've ever heard. I'm not sure how you would copy it without having their mufflers which are the most expensive part of the system. The rest is just piping and for the most part piping is piping.

  4. #4
    formally 01 T/A 0verkill's Avatar
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    "Arrest Me Red"
    2001 trans am

    for a cat back i will always say magnaflow. but i wish i would of got the x pipe

  5. #5
    Junior Member 99superhawk's Avatar
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    Arctic White
    1999 Trans Am

    magnaflow is great for performance. i had it on my last f-body. but the tone is WEAK. hence my favor for chambered/bullet catbacks. thanks, though. ...and yeah, i bet with an "x" it would sound much meaner.

  6. #6
    Just me Y2KPewterSS's Avatar
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    Pewter metallic
    2000 Camaro SS

    I have a fabbed GMMG, I love it.
    CCW SP 500s 18x10 275/35 18x11 295/35
    SLP CME with GMMG style catback
    Painted manta stripe

    Quote Originally Posted by konigandy6 View Post
    I'd rather be bi than full homo!!!!

  7. #7
    Impounded
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    gmcheviac

    As far as chambered goes, yes the power sticks are the best choice. They're the only ones other than the sweet thunders which are a smaller inner diameter and choke flow. I'd be ready for rasp if you ever did go with a catless y, i've heard some nasty cars like that with gmmg

  8. #8
    Junior Member 99superhawk's Avatar
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    Arctic White
    1999 Trans Am

    oh, i'll be running cats for sure. no worries about rasp as far as i can tell

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