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GMMG / MadHammer Exhaust Install

This is a discussion on GMMG / MadHammer Exhaust Install within the External Engine forums, part of the LSx Technical Help Section category; I installed an SLP dual/dual catback on my car when it was just over a year old. I always thought ...

  1. #1
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    1999 Camaro Z28

    GMMG / MadHammer Exhaust Install

    I installed an SLP dual/dual catback on my car when it was just over a year old. I always thought it was a little too quiet, especially after the car was warmed up. Well 11+ years later I finally decided to replace the SLP setup. I tried contacting GMMG directly (not knowing the full story behind GMMG) and was exceptionally disappointed that they never returned my calls or my emails. After a fair amount of searching on google I finally found out what a lot of you likely already know - GMMG exhausts are made by a guy that runs MadHammer.

    I called Brian at Madhammer the week before the 4th of July and confirmed he was "the guy". They turned my exhaust around extremely quickly and had it on my door step 4 days after I placed my order.

    The install was almost as straight forward as the SLP. The only kicker is the amount of clearance you need under the car to get the one piece muffler/tail pipe section over the axle. Fortunately I have a lift but I still had to move my car around to make room for the pipe. I also had to jack the car up on the lift to make room. I suspect with jack stands and some proper planning this job is easily doable without a lift as well.

    The quality was great. Everything needed was included. And when I hit the key the first time I knew I did the right thing. Here are some pics of my setup. I hope more people will call Mad Hammer. They are a class act and this exhaust sounds perfect.

    For reference I have 100% stock exhaust up to the cat-back.

    [IMG] Exhaust 1 by cheap.inebriant, on Flickr[/IMG]

    [IMG] Exhaust 2 by cheap.inebriant, on Flickr[/IMG]

    [IMG] Exhaust 3 by cheap.inebriant, on Flickr[/IMG]

    [IMG] Exhaust 4 by cheap.inebriant, on Flickr[/IMG]

    [IMG] Car 2 by cheap.inebriant, on Flickr[/IMG]

  2. #2
    Junior Member 71Camaro's Avatar
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    Primer Gray
    1971 Chevy Camaro

    i read a few places that gmmg was out of business or something like that. is that true? i was thinking of getting some for my older camaro. how does the madhammer sound in comparison to the gmmg or is it all the same?

  3. #3
    Member Transambroli's Avatar
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    arctic white
    99 Trans am

    ^It's all the same, I got mine from Vengeance Racing, had it for over a year and am still impressed with the sound. Gets crazy loud once the headers go on though.

    M6 BBK Lts, GMMG, G2 Super Springs, Ls6 intake, pro 5.0,Ported stock TB, Tuned by Frost
    95 Maxima M5 Kyb Gr2 shocks DD

  4. #4
    Senior Member wileyCoyote's Avatar
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    1999 TransAm

    looks good, you have a very nice looking vehicle!

  5. #5
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    Good looking system.

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    Thanks for the comments, guys.

  7. #7
    I need some money huggerls1's Avatar
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    hugger orange
    1999 camaro ss

    Nice ride and marine corps sticker on your lift. Semper fi.

  8. #8
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    Quote Originally Posted by huggerls1 View Post
    Nice ride and marine corps sticker on your lift. Semper fi.
    I wish I could say I was a Marine. My grandfather was a marine and my father was in the army. Last year my father visited Parris Island and brought me back several cool items. That sticker was one item that deserves to be proudly displayed.

    Thanks for your service, hugger...

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