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View Poll Results: Which aftermarket catback sounds nicest?
GMMG
186
20.74%
Borla
164
18.28%
Flowmaster
79
8.81%
Loudmouth
129
14.38%
2OTL
34
3.79%
Hooker
97
10.81%
Magnaflow
109
12.15%
Corsa
62
6.91%
Mufflex
37
4.12%
Voters: 897. You may not vote on this poll
Best Sounding Catback
TECH Senior Member
Joined: Jun 2003
Posts: 9,339
Likes: 3
From: NYC metro area
Originally Posted by MA1384
I really couldn't car any less about the flow issues, people dont realize that a better flowing cat-back would only be good for another 5rwhp or so. I'm not that picky.
That's the point that I urge to people. On bolt-on cars, Flowmaster will not rob you of all that much power. However, on more modified setups it does start to sap some power. But on bolt-on cars it's a good catback. I would consider running one on my next car if they were stianless steel.
On The Tree
Joined: Oct 2003
Posts: 195
Likes: 0
From: Upstate NY
Originally Posted by Vendetta
That's the point that I urge to people. On bolt-on cars, Flowmaster will not rob you of all that much power. However, on more modified setups it does start to sap some power. But on bolt-on cars it's a good catback. I would consider running one on my next car if they were stianless steel.
I agree, for a more modified setup that you would want to get the most out of then I wouldnt go with a flowmaster. But for most less extreme setups, the only way you would know the difference is if you strapped it to a dyno.It is too bad they dont make a stainless steel version of the american thunder cat-back.
TECH Fanatic
Joined: Nov 2001
Posts: 1,098
Likes: 0
From: I-L-L-I-N-O-I-S
Originally Posted by WS6T/A98
Do any of you guys find GMMG sounds simular to Borla on LS1's?
I would not run any other system on an LS1. Period. 
As for the LT1, just about anything sounds great on it...Definitely easier to make an LT1 sound "good" than an LS1 in most cases...I also just threw a cutout on my stock internal LT1 and damn, is that a ferociously MEAN sound (very raw, yet very deep). Pretty darn LOUD too (at any rpm)!
BTW, I only opened the cutout because of how freakin' quiet the Flowmaster cat-back was...Nice deep tone, but silent at idle and not much louder on acceleration. But luckily I already know it will wake up considerably without a cat and when the Hotcam goes in. 
Then this way I'll have the best of both worlds (deep/mean/refined, but not too loud tone threw the Flowmaster & and ridiculously loud sound of open exhaust threw the cutout). 
Mike
Last edited by 2000LS1Z28; Jun 25, 2005 at 01:09 AM.
Thread Starter
TECH Fanatic
Joined: Jun 2002
Posts: 1,124
Likes: 0
From: kuwait
Originally Posted by Brett95z
Buy a catback for the sound, not the peformance. If your that **** over your 5hp difference, get a cutout.
Originally Posted by 12secondDream
Personally i liked my loudmouth and so did everyone else...untill i got my longtubes with no cats...YIKES!!!! i think it's time for true duals
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Teching In
Joined: Jun 2005
Posts: 47
Likes: 0
From: Round Lake, IL.
i have been debating on what system to buy and i found that corsa or GMMG and even mufflex 4'' sound awesome... to bad they all cost $600+
with LT-1's it is a case of you get what you paid for in sound
with LT-1's it is a case of you get what you paid for in sound
I'd have to say the 2otl sounds hella good also. I had a friend w/ a SS that took my old topend LT4 stuff and put in his car w/ the hot cam. It sounded better in his car then in mine w/ the borla. Made me sick after that. LOL!
The GMMG sounds nice on LT1's as well esp 396's. I just installed it this past wkend and it definetly is deep and throaty old school style. Sounds better w/ cats IMO but I keep clogging mine up so I have to go OR pipes for now. The borla on my 396 sounded pretty good too but I think the GMMG takes the nod and will only sound better over time as I hear from others after a few hundred miles there unbelievable.
The GMMG sounds nice on LT1's as well esp 396's.
I just installed it this past wkend and it definetly is deep and throaty old school style. Sounds better w/ cats IMO but I keep clogging mine up so I have to go OR pipes for now. The borla on my 396 sounded pretty good too but I think the GMMG takes the nod and will only sound better over time as I hear from others after a few hundred miles there unbelievable. 
Originally Posted by SRZ
I'd have to say the 2otl sounds hella good also. I had a friend w/ a SS that took my old topend LT4 stuff and put in his car w/ the hot cam. It sounded better in his car then in mine w/ the borla. Made me sick after that. LOL!
The GMMG sounds nice on LT1's as well esp 396's. I just installed it this past wkend and it definetly is deep and throaty old school style. Sounds better w/ cats IMO but I keep clogging mine up so I have to go OR pipes for now. The borla on my 396 sounded pretty good too but I think the GMMG takes the nod and will only sound better over time as I hear from others after a few hundred miles there unbelievable.
The GMMG sounds nice on LT1's as well esp 396's.
I just installed it this past wkend and it definetly is deep and throaty old school style. Sounds better w/ cats IMO but I keep clogging mine up so I have to go OR pipes for now. The borla on my 396 sounded pretty good too but I think the GMMG takes the nod and will only sound better over time as I hear from others after a few hundred miles there unbelievable. I'll try to get a sound clip of my magnaflow with LTs and no cat. I'm absolutely in love with the sound. Magnaflow IS quieter with the 'ol cat on there, but take it off and you've unleashed the beast.
I have 2 Z's a 95 and a 97 both with the same pacesetter LT's with there ory the 95 has the magnaflow and the 97 has the LM, The magnaflow sounded like *** all it did was pop pop pop upon decel and sounded raspy as hell but was louder at idle and had that deep tone that it seems everyone wants i actually couldn't believe that i drove it around liking the sound of that pop pop pop and rasp.... the 97 with the Lm sounded fine to me it didn't have a deep tone but sounded clean @ idle and there was no pop pop pop upon decel, but it does get raspy expecially when im crusing in 5th and get on it without down shifting but i think my header leak adds to the odd sound i get while accelerating. but i seem to get more of the mustang crowd & older guys telling me my car sounds bad *** with the LM and long tubes compared to the magnaflow and long tubes... i think if i added some high flow cats to my y-pipe the lm would lose the rasp and gain that deep sound back that it had as just a cat back.. all exhaust will have a rasp as long as there is no cats and i think the magnaflow has the worst rasp expecially when you remove the cat.
I can only compare the Borla and GMMG. I had the Borla system on my Firebird for 8 years and decided it was time for a new look and new sound, so I installed a GMMG today......that was one of the costliest mistakes I've made in a while The Borla has a nice deep mellow sound and roars at WOT vs. the GMMG's loud obnoxious blat blat blat at WOT and cackle cackle on deceleration. The only time the GMMG sounds good is at idle.
My vote is for Borla.
The Borla has a nice deep mellow sound and roars at WOT vs. the GMMG's loud obnoxious blat blat blat at WOT and cackle cackle on deceleration. The only time the GMMG sounds good is at idle.My vote is for Borla.
I TOO had the borla for 8 yrs. I hope to not encounter that because if I do I'll be upset too. But look at it this way. You can get damn near all your back for selling a GMMG. You'll never have a problem getting a buyer for it.
Are you running cats?
Are you running cats?