Longtubes and GMMG
Thread Starter
TECH Addict
iTrader: (3)
Joined: Feb 2005
Posts: 2,305
Likes: 2
From: Citrus Heights, CA
Longtubes and GMMG Since the search button sucks now and isn't pulling up anything, and my dial up won't let me listen to ls1sounds.com....Who has the gmmg with longtubes? I've got the gmmg CB on the way and am considering QTP LT's w/cats. Living in CA I don't want to attract too much negative attention. Would adding LT's to my already heads/cam and gmmg be super loud? Would it be loudmouth and offroad pipe loud? Would it sound very raspy? I know this is pretty subjective, but any input will help. Thanks. 
Staging Lane
Joined: Apr 2005
Posts: 70
Likes: 0
From: Homestead, Florida
Originally Posted by Redneck Z
Nobody has longtubes with their GMMG?
Thread Starter
TECH Addict
iTrader: (3)
Joined: Feb 2005
Posts: 2,305
Likes: 2
From: Citrus Heights, CA
Originally Posted by Scotty-Z
Yes, LTs will open up a bunch more sound, especially with heads/cam. I'd say yes, Loudmouth and ORY loud unless you get a catted Y.
I have GMMG with Kooks LT's, catted Y and stock cam and it sounds great. At WOT, it is louder than my friend's LT1 355 that has a good size cam, Hooker LT's, ORY, and 4" Mufflex. I have heard GMMG with an ORY and it is really loud. I def. put cat's on to keep the noise down.
TECH Resident
iTrader: (6)
Joined: Apr 2004
Posts: 795
Likes: 0
From: The other, other, other A-Town, NM
I've Kooks lts through the catted y and back to the gmmg. It's quite loud and agressive with the stock cam and it's even more so with the MS3 installed. It's an enjoyable loud though, it never gets annoying to me. Too bad I'm selling the gmmg and catted y for the sake of power gains 
.
. Trending Topics
Thread Starter
TECH Addict
iTrader: (3)
Joined: Feb 2005
Posts: 2,305
Likes: 2
From: Citrus Heights, CA
Originally Posted by NOZR1
I have GMMG with Kooks LT's, catted Y and stock cam and it sounds great. At WOT, it is louder than my friend's LT1 355 that has a good size cam, Hooker LT's, ORY, and 4" Mufflex. I have heard GMMG with an ORY and it is really loud. I def. put cat's on to keep the noise down.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo TECH Resident
iTrader: (6)
Joined: Apr 2004
Posts: 795
Likes: 0
From: The other, other, other A-Town, NM
Originally Posted by Redneck Z
Thanks for the response. Sounds like it's gonna be pretty loud even with cats. Is there any rasp?
GMMG + LT's = loud, no matter how you slice it. But its a very clean sound, especially with cats. I think it will draw attention, but not negative (well, any noise to some cops will get their attention)
It is very subjective, but I think if you get cats, a cammed car w/ lt's and gmmg will make you smile
It is very subjective, but I think if you get cats, a cammed car w/ lt's and gmmg will make you smile
I agree. 
here you go
Befor headers
http://video.ls1tech.com/Player.aspx...D294&kw=86&p=0
After headers(stainless works)
http://video.ls1tech.com/Player.aspx...9E04&kw=86&p=0
You can decide this is with high fow cats and man it sounds awesome.
Befor headers
http://video.ls1tech.com/Player.aspx...D294&kw=86&p=0
After headers(stainless works)
http://video.ls1tech.com/Player.aspx...9E04&kw=86&p=0
You can decide this is with high fow cats and man it sounds awesome.
I gotta say that I just installed Kooks LT's w/cats and a GMMG catback and I get considerable rasp around 2-3k rpm under moderate to heavy throttle. Other than that, the setup sounds great. I'm thinking the reason I get the rasp is because I'm using Kooks' new metallic cats, which are almost like having no cats since they flow so well.
Chris
Chris
Thread Starter
TECH Addict
iTrader: (3)
Joined: Feb 2005
Posts: 2,305
Likes: 2
From: Citrus Heights, CA
Originally Posted by mean02Z28
I gotta say that I just installed Kooks LT's w/cats and a GMMG catback and I get considerable rasp around 2-3k rpm under moderate to heavy throttle. Other than that, the setup sounds great. I'm thinking the reason I get the rasp is because I'm using Kooks' new metallic cats, which are almost like having no cats since they flow so well.
Chris
Chris
Do you have a soundclip?
Why dont you just mate your current y-pipe/cats up to the headers when they get there? I have the magnaflow cats on my car now with 3" duals. They made the car incredibly quieter.
This option is much cheaper and will flow + reduce the noise great. The flowmaster merge is also a very nice piece.
Any reason you are looking to get rid of it?
This option is much cheaper and will flow + reduce the noise great. The flowmaster merge is also a very nice piece.
Any reason you are looking to get rid of it?
Thread Starter
TECH Addict
iTrader: (3)
Joined: Feb 2005
Posts: 2,305
Likes: 2
From: Citrus Heights, CA
Originally Posted by TheBlurLS1
Why dont you just mate your current y-pipe/cats up to the headers when they get there? I have the magnaflow cats on my car now with 3" duals. They made the car incredibly quieter.
This option is much cheaper and will flow + reduce the noise great. The flowmaster merge is also a very nice piece.
Any reason you are looking to get rid of it?
This option is much cheaper and will flow + reduce the noise great. The flowmaster merge is also a very nice piece.
Any reason you are looking to get rid of it?
That is an option. It kind of depends on what LT's I get and where I have it done. I'm not really looking at getting rid of the y-pipe/flowmaster merge though....I'm just trying to get an idea of how loud longtubes will make my gmmg.