LT1-LT4 Modifications 1993-97 Gen II Small Block V8

GMMG Exhaust?

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Old Apr 6, 2013 | 12:40 PM
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Default GMMG Exhaust?

So I haven't posted in a while but have a question thats pondering. I did do a quick search with no results,maybe I didnt really search well enough but maybe you guys can help me out. I am on my way to check out an exhaust and i looks like GMMG but how can I tell if its authentic? If it is indeed a true GMMG I will be lucky.
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Old Apr 6, 2013 | 01:06 PM
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The GMMG is the only one I know of to use the baffles or w/e they are the way they do, plus it's all 304 stainless and is probably marked somehow by them.
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Old Apr 6, 2013 | 01:14 PM
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I was thinking itshould have a marking somewhere too! But dont have much input. I have seen replicas of it.
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Old Apr 6, 2013 | 01:35 PM
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It's not stamped or marked anywhere that I ever saw on mine. Remember, you can pick this catback up from the original maker for $625 shipped (without tips). Too many people overpay for GMMG.
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Old Apr 6, 2013 | 02:57 PM
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Originally Posted by MasterTomos
It's not stamped or marked anywhere that I ever saw on mine. Remember, you can pick this catback up from the original maker for $625 shipped (without tips). Too many people overpay for GMMG.
I paid $750... worth every penny to me. Still looks perfect, sounds sexy as hell. Got everything shipped me to and hooked it right up.
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Old Apr 6, 2013 | 06:32 PM
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I just picked it up guys. It is stainless and Im pretty confident its reall. I got for $150 but its missing the I pipe but thats nothing to me. I try and get pics up
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Old Apr 6, 2013 | 08:34 PM
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post some pics up, if real you got a steal.
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Old Apr 6, 2013 | 10:58 PM
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Originally Posted by 93QWKZEE
I just picked it up guys. It is stainless and Im pretty confident its reall. I got for $150 but its missing the I pipe but thats nothing to me. I try and get pics up
Post picks. Hell of a deal.

Originally Posted by ThoR294
I paid $750... worth every penny to me. Still looks perfect, sounds sexy as hell. Got everything shipped me to and hooked it right up.
Unless you go through madhammer, that's about the cheapest anywhere sells it. I planned on getting different tips, so I saved some money ordering from him (plus I'm a cheapass lol). Gotta love how GMMG sounds.
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Old Apr 6, 2013 | 11:39 PM
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That's what I'm going to switch to instead of my SLP LM2 at some point.
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Old Apr 7, 2013 | 02:20 AM
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Is there any drone with the gmmg (mad hammer ) setup? I'm possibly switching from my magnaflow catback to the madhammer setup . Was just looking for drone/ highway speed comparisons if anyone was kind enough to share.
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Old Apr 7, 2013 | 02:27 AM
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iirc there is drone but not much compared to a borla. Plus i had no cats.

Right now i have a ls1 with borla, but i really miss my old lt1 with gmmg. It used to set off alarms with stock exhaust manifolds. And not cus it was too loud, just becuause of its deepness. I dont really consider GMMG to be loud. Just deep.
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Old Apr 7, 2013 | 02:45 AM
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Well my car is currently full le2 setup with pacesetter headers and ory, and a magnaflow catback with like baffling in the muffler. I love how it sounds, but it drones like a sum bitch.

I keep seeing threads about gmmg being way too loud. I'm just curious how it compares to magnaflow
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Old Apr 7, 2013 | 11:00 AM
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my friend has a GREAT video on FB, but its private and i dont know if he has it.

I love my exhaust. It is seriously what's keeping me from going LS1
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Old Apr 7, 2013 | 11:22 AM
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https://picasaweb.google.com/1101704...eat=directlink
Man I cant figure this pic upload out. I used to be able to imbed the photo but there's a direct link to the pic of the exhaust. It's dirty but I polished a small piece of piping and it shines right up.

Last edited by 93QWKZEE; Apr 7, 2013 at 11:30 AM.
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Old Apr 7, 2013 | 01:50 PM
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Originally Posted by 97lt1camaro
Is there any drone with the gmmg (mad hammer ) setup? I'm possibly switching from my magnaflow catback to the madhammer setup . Was just looking for drone/ highway speed comparisons if anyone was kind enough to share.
I've got shorties, no cat, and a gmmg catback. The drone isn't really bad at all. The sound when you put your foot down is worth whatever drone there is at cruising speeds.
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Old Apr 8, 2013 | 09:45 AM
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Definitely a GMMG - what a steal!
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Old Apr 8, 2013 | 09:36 PM
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Looks like the real deal.
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Old Apr 9, 2013 | 05:39 AM
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Totally a fake. Ill take it off your hands for $200...
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Old Apr 9, 2013 | 11:07 PM
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^ haha ok its sold ! You know the crazy thing about it is the guy was complaining it was to loud! And switched it out for a magnaflow. Crazy right? I have one more question what kind of hangers are used on this exhaust? In the pics you can see it has a twisted flat steel welded with a hole on the pass side and on the drivers side a hook welded? Anybody have picks of what hooks it to the body?
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Old Apr 10, 2013 | 03:50 AM
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Originally Posted by 93QWKZEE
^ haha ok its sold ! You know the crazy thing about it is the guy was complaining it was to loud! And switched it out for a magnaflow. Crazy right? I have one more question what kind of hangers are used on this exhaust? In the pics you can see it has a twisted flat steel welded with a hole on the pass side and on the drivers side a hook welded? Anybody have picks of what hooks it to the body?
It uses the stock F-Body exhaust hangers. Good find and good exhaust!
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