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Homemade GMMG Chambered Exhaust?

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Old 11-17-2005, 01:27 PM
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Default Homemade GMMG Chambered Exhaust?

I have recently though about switching from my Hooker 3" Cat Back system to something else. I like the sound of the GMMG Chambered exhaust system but there is no way i'm going to pay $700 or more for an exhaust system! I was on Summit Racing's site when I found some chambered mufflers that "look like" the ones used in the GMMG kit. Has anyone used these mufflers or tried to make a homemade GMMG knockoff system? Thanks...
http://store.summitracing.com/partde...5&autoview=sku
Old 11-17-2005, 01:34 PM
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thats a good question, cuz im kinda tired of my magnaflow so im thinking of swapping the muffler out for something deeper.
Old 11-17-2005, 01:34 PM
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Chambered muffs all pretty much sound good, I don't think anyone has cut open a GMMG one though to investigate what the inside looks like.
Old 11-17-2005, 01:42 PM
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Originally Posted by Smoker_98
Chambered muffs all pretty much sound good, I don't think anyone has cut open a GMMG one though to investigate what the inside looks like.
I'll do it... who wants to give me a research grant?
Old 11-17-2005, 02:02 PM
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Ive thought about doing it with a loudmouth
Old 11-17-2005, 02:12 PM
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I've thought about it too - all it would take is a few 90 degree bends, some tubing, and 2 chambered mufflers all welded together. Doesn't seem that expensive to me to fabricate - even for stainless.

Let me know if you decide to try it

Mark
Old 11-17-2005, 02:25 PM
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Would you need all the bends? Couldnt you just put the 2 mufflers on each side?
Old 11-17-2005, 02:54 PM
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if someone can tell me a good muffler to use, i may try it. I dont like my magnaflow all that much anymore, and want a deeper/throatier tone. what would be a good muffler, and i might try it out??
Old 11-17-2005, 02:56 PM
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Maybe put a borla muffler in the Ipipe for a BorlaFlow?
Old 11-17-2005, 03:02 PM
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Originally Posted by dug
Ive thought about doing it with a loudmouth
Same here, was about to do it but I love the sound so much now I dont want to change it. Might try it though if my car is too loud with the FM13.
Old 11-17-2005, 04:26 PM
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I would go with true duals. On my next LS1 I am going to get the guys at gmmg to do some hacking on a system and make me some GMMG true duals
Old 11-17-2005, 04:41 PM
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ive thought about it too. but would rather do true duals with the chambered,

ill be the guinea pig for this one maybe
Old 11-17-2005, 04:46 PM
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looks pretty simple to make, just a good shop and some tubing


Old 11-17-2005, 05:10 PM
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Id be interested, kinda getting tired of my ol' hooker! I dont see why it wouldnt work. I would love to do that with my CME. It sure is expensive to just try & see what it sounded like though. But in the end, You'd prolly still come out about $300 cheaper then what it would be to buy the GMMG. If anybody try this, please let us know how it goes. Unless ya'll all want to donate me $10 a piece then Ill try it this weekend..

Last edited by Z'mnypit; 11-17-2005 at 05:17 PM.
Old 11-18-2005, 10:28 AM
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DANG! "Z'mnypit" I LOVE your car! What wheels are those? Very nice!
Old 11-18-2005, 07:35 PM
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I did it with all stainless steel mandrel bends.
I wouldn't reccomend it, as it was a lot of trouble, but it did sound like the GMMG. It was about $300 cheaper, and didn't fit that well since I didn't route the piping the same way as GMMG.


I used sweet thunder mufflers, it sounded very deep and loud.
Probably the best sounding setup of 8-9 exhaust setups I've had so far, but still not as good as true duals.
Old 11-18-2005, 11:00 PM
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that would be awsome zeeman let us know how it turns out.
Old 11-18-2005, 11:01 PM
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z'mnypit what kind of wheels are those?
Old 11-18-2005, 11:08 PM
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fast ls1, was it worth it in the end?? or would you recommend going duals/are duals cheaper??
Old 11-18-2005, 11:21 PM
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Originally Posted by HorsePowerKing
that would be awsome zeeman let us know how it turns out.
Wont be anytime soon unless i hot the lotto. If i hit the 320 million i will buy exhaust for everyone on the tech


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