True duals or GMMG?
Thread Starter
TECH Enthusiast
Joined: Jul 2003
Posts: 734
Likes: 7
From: Imperial Valley, CA
True duals or GMMG? I cant decide on an exhaust system. My exhaust guy says he cannot make a true dual all the way to the back. 
I know it is possible, but i havent seen any pictures of it. Im sure if i take him the pics, he will be able to do it. I mean, headders and no cats, that thing has to go all the way back. I can only imagine the drone and noise if it is only dumped. What is the difference between true duals and GMMG? (Besides the mufflers.) Can they just be fabricated also? The only difference i see is that the bullets are located after the differential? They are a dual exhaust right? The guy who does my exhaust said if it was possible, he would charge me $100, so i would really like to see some pics if u guys have any. Thanks 
I know it is possible, but i havent seen any pictures of it. Im sure if i take him the pics, he will be able to do it. I mean, headders and no cats, that thing has to go all the way back. I can only imagine the drone and noise if it is only dumped. What is the difference between true duals and GMMG? (Besides the mufflers.) Can they just be fabricated also? The only difference i see is that the bullets are located after the differential? They are a dual exhaust right? The guy who does my exhaust said if it was possible, he would charge me $100, so i would really like to see some pics if u guys have any. Thanks 
FWIW, I removed a Dr Gas X pipe with Bullits and replaced it with the GMMG and lost ZERO power. My curve stayed the same on a heads/cam car. I think true duals out the back kills any benefit it may have had in the beginning cutting them off at the axle. Goodluck in whatever you decide.
TECH Enthusiast
Joined: Mar 2003
Posts: 503
Likes: 0
From: Temple, TX
GMMG is not a true dual setup. Its a regular catback system except it uses two chambered mufflers. Chambered mufflers and bullets are not the same. A GMMG style system can be fabricated by buying two sweet thunder mufflers that are the correct length, a y-collector, and then having the right bends made.
I prefer duals though and that is what I have on my car using spiral flow mufflers. I'm dumped at the axel and the interior noise really isn't as bad as you think.
I prefer duals though and that is what I have on my car using spiral flow mufflers. I'm dumped at the axel and the interior noise really isn't as bad as you think.
