egott_91Z28

Like the title says...is anyone running GMMG on there 3rd gen? I'm just curious as to how it sounds on a TPI motor!

ewwewwnotme

I got it. Sounds good with stock headers but adding the headers really sets it off.

Shadowman

750 for any catback system is absolutely ridiculous. I wonder if it comes with a free air freshener?

DaSkinnyGuy

listen if $750 sounds like alot then you will be missing alot of good sound. Believe me the GMMG sounds the best on any GM motor. And believe me that $750 if well worth it for the quality. Many people like me are cheap we buy the flowmasters and then we find out that after a few months they lose their orignal sound. You pay for what you get. Just get the exhaust and dont worry what anyone says because you are the only one who will be driving your car and you are the one who says how your car should be. So go out there and buy a GMMG

Orr89RocZ

iTrader: (20)

take it to a good exhaust shop preferably a performance shop and buy two chambered tube mufflers from stainless works or classic chambered or sweet thunder. then have them run the pipes. FAR cheaper than GMMG ridiculous mark up, possible to do it for 300-400 bucks like a normallly priced catback. Same thing as GMMG, its all a GMMG is. It uses more expensive stainless exhaust tubing tho but still is cheaper to have someone else make it for you.

I'm running a single chambered tube on my car at the moment. here is what it sounded like on my TPI L98...all stock internally with just some bolt ons.

http://media.putfile.com/Chambered-Tube-exhaust-clips

Shadowman

Yea man, if you have the money, by all means buy the GMMG. Just not my cup of tea though.

egott_91Z28

Do you have a sound clip of your exhaust??

travisnd

My RS is running the GMMG exhaust. It's the only modification on the car, and was on the car when I purchased the car. I also have the stock exhaust and have been thinking of putting the stock exhaust back on....

DaSkinnyGuy

If this is the case then you should sell egott the exhaust and he can get a good deal

87_GTA_5.7

How would you go about puting the GMMG on with long tubes? I have true duals with magnapacks and its old now love the sound but time for somethin new..Iv wanted it for a while..but I dont want a y pipe right under the tranny so it doesnt get hot. How would that work? Im ganna order mine pretty soon..but the car wont be done for a while =( the engine is in OK..=)

egott_91Z28

Why are you taking it off? What's wrong w/ it?

I wasn't looking to get GMMG! lol...i was just wanting to see what it sounded like...but if i could get it for half price or less...i wouldn't stop from doing it!

Orr89RocZ

iTrader: (20)

if you have true duals then just get rid of the old mufflers and insert chambered tubes into your system. You can get GMMG chambered tubes from stainless works or classic chambered. they are around 50-70 bucks each...some maybe abit more if you get all stainless and/or polished.

if you dont wanna run a y-pipe then you have to keep true duals and not run the GMMG exhaust, just chambered tubes which is probly just as good sounding...i love mine.

egott_91Z28

Yeah...you have to run a y-pipe if you are going GMMG. Other wise like Orr89RocZ said...your best bet is to get the chambered tubes!

Come on guys...i'm yet to hear GMMG on a 3rd gen! ...that's the reason for the whole thread!!

travisnd

I bought the car to show and the car is completely stock, so with the exhaust on, I lose points b/c it's not stock. I do like the sound of the exhaust and there is nothing wrong with it and I do highly recommend it. I've even thought about taking it off the RS and putting it on my SS....hehe...

Reid Fleming

iTrader: (2)

Their price went up Jan 1st this year.

I picked up mine for $735 with the oval tips on a group purchase a few years back. I'd buy it again. The system is still as much fun to listen to as it was new.

egott_91Z28

That would be a good idea...it would be awesome on the SS. I'm trying to get my step-dad to get it for his 35th Ann.

ewwewwnotme

Ill try to get a soundclip tomorrow. Have to find the usb cord for the camera first though.

Orr89RocZ

iTrader: (20)

there is one on youtube i believe that was posted here awhile go.

http://www.youtube.com/watch?v=h0FM5eVASdM

http://www.youtube.com/watch?v=uiIsvubpzl8

http://www.youtube.com/watch?v=hd3EbmJPhsI

87_GTA_5.7

Id like to keep the true duals but if I go with chambered tubes and make it duals it wont sound the same will it? I thought the GMMG tubes were different..

egott_91Z28

So...did anyone get a clip of their system? Also...if you have the oval tips...i would like to see pics!

travisnd

Here of pics of both my cars but you can see the tips on the RS in this picture....

Orr89RocZ

iTrader: (20)

it will sound alittle different depending on how you run the pipes and which tubes you go with.

GMMG i do honestly believe use stainless works chambered tubes.

If you run 2.5" true duals over the axle, on both sides, you can mount the tubes where the GMMG system lies, and run tips out the back. It will sound close to the gmmg but probly louder.

GMMG is a single catback that splits into 2 mufflers. true duals will have 1 muffler per side, so it will have more sound but will be close to that of the gmmg.

87_GTA_5.7

Well I dont like running over the rear end..but with a factory "style" I would but not duals. I hate exhaust tips on any car..Ill have to bend mine down somehow and where.

Orr89RocZ

iTrader: (20)

well you dont have to tips if you dont want. nothing wrong with duals over the axle.

else just run the tubes under the car and dump them before the axle, 45 degrees out. Run an H pipe between them and you'll have a great sounding system, similar to gmmg but not the same

Fast92RS

iTrader: (2)

Im going to go with the GMMG exhaust I think it sounds pretty cool. Im moving my exhaust completely to stainless steel. Starting with stainless works headers and y pipe from hawks and the GMMG cat back. I just have to modify the y - pipe to put two bullet style stainless steel cats on.

DaSkinnyGuy

Smartest person with a thirdgen award goes to you

egott_91Z28

That looks good. I want different tips, because i don't like my Flowmaster tips, so i'm thinking about getting a set of the oval GMMG tips. This picture really helps me on what i should do! Thanks a lot man!

ewwewwnotme

I just found the usb cord for my camera. Ill make a vid/sound clip tomorrow when I get out of school.

egott_91Z28

Thanks man!

ewwewwnotme

http://www.youtube.com/watch?v=05ZG0kacKek

Here it is, revs up to 3000

egott_91Z28

Sounds really good from the exterior. Is it loud on the interior when you have the door closed?

Do you think it would sound like that on a 305? I have the same headers as you...but i have the 5.0 instead of the 350 (unfortunately!)

ewwewwnotme

When you get to about 2 grand its loud in the interior. It should sound pretty close on a 305.

egott_91Z28

That's kinda how my exhaust is! I think it sounds the best at 2 grand to be honest!

I'm thinking about getting a whole new set-up...but i'm not sure! I would like to do Hooker Long Tubes w/ an ORY and GMMG cat-back. But i don't really want to fork out the money right now! We'll see!

89RS_82Z

iTrader: (2)

yea that sounds good

travisnd

My car sounds alittle deeper than that and not quite as loud and it's a stock 305 except for the GMMG

ewwewwnotme

Yea my car has a high idle I need to get fixed. It was ideling about 1000 to 1100 rpm. Couldnt get the nice low rumble from the lower rpms.

Fast92RS

iTrader: (2)

That sounds sweet. I wonder how it would sound with a set of long tube headers.

DaSkinnyGuy

My friend has a SLP LM2 on his 305 firebird its kind of quite, no matter what exhaust you put onto a 305 they are quite. The 350 is where the GMMG exhaust really wakes up.

egott_91Z28

My car is a 305 and it's pretty loud! I bought the car w/ the whole exhaust (in my sig) and at about 2 grand she is pretty loud, of course the stupid cat quiets it a little. I have an exhaust clip (not long only a couple revs) if you all want to hear it!?

ewwewwnotme

Lets hear it.

egott_91Z28

Here it is!!

egott_91Z28

Here it is at idle and a walk around!!

Justin89Formy

iTrader: (26)

Thats my car! You forgot the wide open throttle video though lol

http://www.youtube.com/watch?v=0Qwas...eature=related

87_GTA_5.7

Im ordering the long tubes from hawks with a Y pipe and then going to get GMMG after the headers come in!! I cant wait!!

ThirdGenFire

Best catback I have chosen..of course the GMMG is on my LS1 T/A but I am buying another GMMG to replace my overdone Flowmaster 80 series. Without cats...no thanks. Catted Y-pipe is the way to go with the GMMG IMO. I am ditching the Shorties and I too will be going with the LT's from SSW and catted Y(custom from my fav exhaust shop)to set my Iroc apart from the also rans. Hopefully my little LB9 can keep up with my T/A before I get my head and cam kit from Vengence next spring. Hell I need a head and cam kit for my TPI just to get to where my T/A is stock. Damnit
Go GMMG!!!!

boldguy

it sounded like a million bucks on a stock TBI with manifolds!!! i just bought a system for my (mostly) stock 350TPI with headers cats intake etc.
ill try to put a before and after video up on youtube if i find out how to get the damn thing working.

Reid Fleming

iTrader: (2)

How do you find the GMMG is on a convertible? It's the loudest muffler system I've heard for F-bodies on a coupe. Can only wonder it's too loud on a convertible?

boldguy

Here is a Before:
http://www.youtube.com/watch?v=GW3Us9Gxd8Y

Ill put up an after once i recieve the catbac in the mail!!! They said only about one and a half weeks till it ships!

ThirdGenFire

Hopefully you get it sooner. It took 5 days for mine to get to me from MMacon, GA to Avondale, AZ. So you might get it sooner, or hopfully depending on the day you ordered it.
I personally might switch my GMMG from my T/A to my Iroc and throw a B&B Cat back on my T/A. So might be cool not to spend that $700 for another GMMG..oh wait the B&B costs $640....damnit. Haha. Still love it, let's hear that new exhaust when you put it on!