ThoR294

iTrader: (6)

Just wanting to know who has them, or has had both...

whats the HP gain difference between them... and which one do you prefer, sound wise? my dads '93 T/A has borla, and it sounds so ******* sick... but i have heard GMMG and it sounds pretty sweet also.

http://www.youtube.com/user/thor294 for GMMG clips!

porksoda

iTrader: (39)

I'd recommend GMMG all the way! IMO Borla is just a really expensive cutout.

FatalZ28

It honestly sort of is, although IMO the Borla w/ an open plate sounds MEAN under WOT, yet still being somewhat civilized just cruising unlike open headers..


I havent got the chance to hear and LT1's with GMMG, so my vote for Borla is going off of that.. They are both great systems and i'm sure you will be happy with either one in the end.

LT1

iTrader: (1)

i voted borla, because when i ran them on previous z28 they sounded amazing w/ cats, good cat back for daily driver.

SRZ

iTrader: (14)

I've had both. Still have the GMMG now as a matter of fact and sounds like POOH w/ out cats. Cats? The borla didn't sound bad at all w/ or w/ out cats but was a bit too raspy for my tastes on the decel. I'm selling my GMMG in about 2 mos too w/ less than 1000 miles on it as the neighborhood I'm moving into has HOA. I'll be looking for a 4" or 3.5 system w/ single hideaway tip.

StealthFormula

iTrader: (35)

I've never been real impressed with Borla myself. I had GMMG on my old car and nothing I mean nothing compares.

Elliott's94Z

iTrader: (12)

A buddy has a borla on his bird and it's pretty nice and sounds like a beast

TRIPOWER1

I just cant see spending 1k on an cat back. Hooker on an lt1 sounds great and order an electric cutout and still be under a 1k.

BOLO

iTrader: (40)

The first mods I did when I bought the car was the adj.Borla catback and the Callaway Honker(now known as the Moroso cold air intake), back in 1995. Bought the Borla directly from them, at that time no one carried them yet. So, to me, Borla is the best sounding catback that I've heard on an LT1.

moserman

iTrader: (7)

i had borla on my Z for about 2 years, loved how it sounded @ idle, but cruising around it sounded choppy IMO (i had the rear tips cut off) but on decelleration it sounded bad, i have GMMG on now and its nowhere near as good of sounding at idle but its much more louder and a smoother sound and i love it. i reccomend gmmg

cookba

iTrader: (10)

i have a GMMG but have been around allot of people with Borla, and Magnaflow as well as the LM. The Borla and LM were way to loud and not clean sounding with an ORY. With a catted y the borla sounded better but the LM was nasty still. I have heard many people say that the GMMG is for catted Y people only, and i believe them. My GMMG sounds awesome and no matter how hard i punch the pedal it is loud and clear. The magnaflow is a real good catback as well and is cheaper and is a full tone exhaust with little to no rasp. look on ls1sounds.com, for ideas.

96autoformula

I'm running the borla with an open cutout behind hooker headers and it's very manageable at low rpm's....over 4,000 when the stall locks up it's a whole different story. At 6k plus no matter how high the stereo is turned up, the borla is all i hear.

tscheu5452

I loved the Borla sound when I had a cat. Now with the cat gone and Kooks headers, ORY it has a loud "crack" at higher rpms. I now run one of the middle plates to settle this down.

96silverram

iTrader: (12)

I voted for the GMMG, but you should expand your choices to include CORSA. My premium 3.5" twin tip sounds real mean when you get into it. FLP 1 3/4" LT's, FLP y-pipe with off-roads and CORSA premium 3.5" twin tip. If your going to choose between the two you have listed for sure get the GMMG, pure sex on a LT1, especially with LT's

tnnt

how much for your gmmg then???

Fast_94_Z

iTrader: (12)

the corsa are nice but expensive. but since this a vote between gmmg and borla ill give it to borla i had my borla on my car and it sounds nice with the bbk headers. but my taste has changed and its a bit to raspy for my taste now.

transamws6_97

iTrader: (5)

my friends borla on his ls1 and ory sounded like poo. He switched to hooker catback. I have duals w/ powersticks which is basically the same muffler that comes on gmmg...I love chambered mufflers

95_transam_lt1

iTrader: (6)

http://www.youtube.com/watch?v=As2Jx2Se308
thats borla on a ls1 i think it sounds awesome, dont mind the guy hanging out the ttops lol

LS1 Eddie

iTrader: (2)

I was going to change my Borla out for a GMMG because I've had the Borla forever and I was bored. About 3 weeks ago I was at work outside and my friend was moving the car for me. He fired it up and I could have sworn I felt the ground shake ....needless to say that alone made me stick with the Borla. I run open plate with a Magnaflow cat.

ThoR294

iTrader: (6)

my dads 93 t/a has borla... it does make the ground shake lol