borla vs loudmouth vs gmmg

Hi, i will be getting exhaust soon. I do plan on getting coated pacesetters. I would like to know what exhaust is the best sounding. I will have cats. Also, which is louder out of all of them.

Borla gets pretty loud, but I think Loudmouth would be the loudest. GMMG is just over priced.

IMO gmmg will sound the best, go with gmmg if you have the $$$ and go with loudmouth if you want it loud

Put a chanbered stick muffler in the I of the Borla or Loud mouth and it'll sound similar to the GMMG. Cool thing about the Borla is the ability to make it quieter when needed.

All that aside, if you're going with headers and you can get by with it, just get true duals.

Yeah get Headers and True duals. Want it louder get straight pipes. HAHAHHAHAHHAHA

They're all going to sound bad with headers+no cats

I'd just get a local mufflershop to fabricate a 3" exhaust with a bullet muffler if you want loud.

That should cost you no more than $350 installed.

Mike

Hi, i will be getting exhaust soon. I do plan on getting coated pacesetters. I would like to know what exhaust is the best sounding. I will have cats. Also, which is louder out of all of them.I think the Hooker Aero chamber mufflers sound the best.

Well, they are all stainless, which is a good thing. The loudmouth will be the cheapest and loudest. The borla will be up there in price unless you can find a used one, but it is adjustable with plates to control the loudness. And the GMMG is also going to be expensive unless you can find a used one, but I think the GMMG is the best sounding catback for LT1's.

Where are the options for Corsa, Magnaflow, and Dynomax?

I wouldn't buy any of the three you listed.

Where are the options for Corsa, Magnaflow, and Dynomax?

I wouldn't buy any of the three you listed.
Im not sure I would buy a Dynomax. Corsa is very expensive, more than Borla if I remember. Magnaflow is a great value around $400 for a full 3" stainless system.

Why doesnt anyone mention B&B? Those quad tips are the hottest!

Im not sure I would buy a Dynomax. Corsa is very expensive, more than Borla if I remember. Magnaflow is a great value around $400 for a full 3" stainless system.
Yes, Corsa costs more than Borla. It is expensive because it's the best (and comes with a lifetime guarantee). I put 325/343 to the wheels with just a lid and a Corsa catback.

Yes, Corsa costs more than Borla. It is expensive because it's the best (and comes with a lifetime guarantee). I put 325/343 to the wheels with just a lid and a Corsa catback.

And Borla has a million mile warranty, same difference, AND is tuneable. Corsa cant knuckle up to that.

True Duals.....enough said

And Borla has a million mile warranty, same difference, AND is tuneable. Corsa cant knuckle up to that.

Tuneable? You mean the built-in cutout? Corsa flows better than Borla with the full-open plate.

Tuneable? You mean the built-in cutout? Corsa flows better than Borla with the full-open plate.

Maybe you are unaware that there is like 7 different sized plated to fit in there and adjust the sound, hence tuneable.

I find that claim hard to beleive that through a muffler, the Crosa outflows an unplated Borla system.

the sound of the gmmg is worth the cost alone! I love mine

Maybe you are unaware that there is like 7 different sized plated to fit in there and adjust the sound, hence tuneable.
I'm well aware of the design of the Borla system. Call it "tuneable" if you want, but the range of choices you get go from average flow (with the smallest plate) to just short of Corsa flow (with no plate).
I find that claim hard to beleive that through a muffler, the Crosa outflows an unplated Borla system.

You've never seen a cutaway diagram of a Corsa muffler, have you? It's basically a 3" straight pipe.

http://www.corsaperf.com/EXHAUSTCUT-OUTsm.jpg

Don't get me wrong -- Borla is a very good system. Corsa is just better.

:)

i wouldnt take either of the two...corsa looks better (borla tips look terrible) but i cant justify the price for either...just as long as its not flowmaster, they all perform pretty much the same...with the exception of true duals of course. ;)

i wouldnt take either of the two...corsa looks better (borla tips look terrible) but i cant justify the price for either...just as long as its not flowmaster, they all perform pretty much the same...with the exception of true duals of course. ;)
I bought my car from someone else who had already put a Corsa system on it, and I didn't pay extra for that. :yes:

When I found out that the car had the Corsa exhaust, a lid, and a Hurst shifter (none of which were listed on the AutoTrader listing, but all of which were things I wanted), I was sold. :D

I bought my car from someone else who had already put a Corsa system on it, and I didn't pay extra for that. :yes:

When I found out that the car had the Corsa exhaust, a lid, and a Hurst shifter (none of which were listed on the AutoTrader listing, but all of which were things I wanted), I was sold. :D

haha well in that case..only an idiot would take a free corsa off the car and swap it for another ;)...Corsa...nice and shiney too:)

Why does everyone always complain about how expensive the GMMG is??? It is the same price as a Borla or a Corsa!!!

I've never heard Corsa on a LT1 but have heard them on several other cars and they are a good exhaust, you can't go wrong with it. Same goes for the B&B. The Borla has a tunable sound and I would have to say sounds pretty good on a LT1.

Everyone has their preferance and it all depends on what you like. I got the GMMG because I heard it on a LS1 on the PowerTour and was right away blown away by the sound. It sounded like my dad's old 64 SS Chevelle. I bought it and would never go another route, I get compliments on it all the time and always am told it has a distinct sound. I got it on a group purchase for 720 with the Oval tips.

Like I said, its all about what you like. Listen to some cars (in person) and see what you think. Video clips don't do the sound of some exhaust's justice.

None of these exhaust systems are going to make any measurable difference of horsepower over one another. Get the one which has an appearance you like.

Also, if you look at it from a fluid mechanics perspective, a Corsa muffler is not going to flow better than an open Borla system. The gasses going through the muffler are going to experience more shear than they would going though a strait pipe, plus, the gasses will experience headloss making the bend to enter the muffler. I really doubt the Corsa muffler even flows a measureable difference more than the Borla, both beign strait through designs. Not that this really matters though because its not going to stack up to a measureable difference in horsepower.

At the point when either of these systems becomes a restriction, your only bet is to step up to true duals.

Also, if you look at it from a fluid mechanics perspective, a Corsa muffler is not going to flow better than an open Borla system. The gasses going through the muffler are going to experience more shear than they would going though a strait pipe, plus, the gasses will experience headloss making the bend to enter the muffler. I really doubt the Corsa muffler even flows a measureable difference more than the Borla, both beign strait through designs. Not that this really matters though because its not going to stack up to a measureable difference in horsepower.
That's all fine in theory. However, fluid mechanics is never that simple.

Just did some Borla research -- they have two versions for 4th gen F-bodies. One without the adjustable passthrough (basically the same as the Corsa setup, $830), and one with ($990). They are indeed a straight-through design -- I didn't know.

Corsa costs $912 or $938 depending on which tips you choose.

Feel free to compare any LS1 M6 lid+borla dyno numbers to mine. :D

I just bought my Corsa from Jeg's and it was like $680 shipped. (I can't remember the exact number). I believe the Borla is more expensive.

You know, on the Borla with the plate removed, it's just a straight pipe. If you plan on running it that way, just get a straight pipe after the cat instead. Someone please feel free to correct me if I'm wrong.

BTW, when I got my Corsa, I took all the parts out and looked at them. Sure enough, when you look into the inlet on the muffler, you can see straight through to the outlet on the other side... no obstruction. But it's not like just having a straight pipe since there's resonant chambers and such to reduce the sound with the most minimal of restriction. I think the Borla with the plate removed essential bypasses the muffler completely.

I'm not saying the Corsa is better. That's very subjective. Both make good HP. It's a matter of personal preference.

I did some looking around, people do see better rwhp gains on the Corsa. Still kinda has me :confused: since the Borla is a straight out design, whereas the Corsa is a straight through design with some sort of noise baffles that would have to hinder flow. But as you said fluid dynamics are never that simple. I still don't like the sound of Corsa myself, or the tips.

I took my Borla tips off my SS and put on stock Z28 rectangles, and it dramatically reduced the sound and changed it all around, although I'm considering changing to the SLP tips now.

the Corsa is a straight through design with some sort of noise baffles that would have to hinder flow.
No baffles. The Corsa uses reflective sound cancellation. There are tiny holes in the sides of the pipe that passes through the muffler. These holes are connected to chambers that run parallel to the pipe. Corsa designs the chambers to perfectly reflect the sound back into the muffler in a way that cancels out the unpleasant (in their opinion) sound frequencies.

In theory, it works similarly to noise-cancellation headphones (while there are of course significant differences).

GMMG all the way baby!

LT1+LE2+LT's-cast+GMMG=

http://s64.photobucket.com/albums/h178/scrmnws6/Formula/?action=view&current=P1020241MOV.flv&refPage=&imgAnch=imgAnch2

Let me know if the link works.

GMMG all the way baby!

LT1+LE2+LT's-cast+GMMG=

http://s64.photobucket.com/albums/h178/scrmnws6/Formula/?action=view&current=P1020241MOV.flv&refPage=&imgAnch=imgAnch2

Let me know if the link works.

I don't think it can get any better than that!:bow: You have a clip of it revving?

I don't think it can get any better than that!:bow: You have a clip of it revving?

yes need more

also do u like GMMG without cats, there are a few ppl that prefer the sound with cats ...im just stuck here whether or not i should go to cats

i prolly wont tho

ON TOPIC:

Like mentioned each exhaust will not show a measurable difference in power

so when choosing basically ur choosing for looks , price and sound

i have the GMMG abviously b/c i think it sounds great

Wont the GMMG be about as loud as the Loudmouth?

Wont the GMMG be about as loud as the Loudmouth?

Not really. The loudmouth has a resonator, it changes the note a little but doesnt really cancel any sound. The GMMG has 2 chambered mufflers that cancel out some of the sound, especially interior drone. Basically its the perfect mix out volume and tone. Its a little loud, but it sounds so good.

As of right now I do not have any rev clips, but will get those as soon as I get my new plugs in.

There is absolutely no drone in it. Make sure you ask the LM people if they have drone.

Running it without cats is great, and have no regrets about it. Id buy this exhaust in a heart beat for my next fbody. Sound > money.

You can see my car running here...

http://videos.streetfire.net/video/959e8b31-3262-4e5d-a509-985801332a72.htm

Let me know what you think.

I must've had about 20 people tell me how badass the car sounds, and that I must've woken everyone up within a mile.

You can see my car running here...

http://videos.streetfire.net/video/959e8b31-3262-4e5d-a509-985801332a72.htm

Let me know what you think.

I must've had about 20 people tell me how badass the car sounds, and that I must've woken everyone up within a mile.

car sounds badazz


and yes i know how loud and good sounding the exhaust could be

ive had plenty of ppl say my car sounds badass

im looking into purchasing an LE2 kit myself

out of these 3 exhausts the GMMG sounds the best when combined with no cats and long tubed headers, the other just sound like crap (borla "open", with plate is bearable but i dont like borla sound) but i also may be biased

Auto x is definatly fun. I was on my street tires and I was all over the place. The vettes were racing with autox specific tires, which made them seem to be on rails.

Tires make all the difference in the world. :D

And yes, mgray, try out an autocross or two. Quite possibly the most fun you'll ever have! :D

Lots of misinformation here, but I'll vote GMMG.

-Dustin-

Thanks for all the replies. I took your advice and found a gmmg for 550 shipped so i bought that. Scrmnws6, your car sounds awsome.

GMMG w/ LT's sounds good but it sounds a whole lot better w/ cats. It gets real deep esp if you are cammed or stroked. W/out cats it just a little too loud and sounds distorted to some degree. Can't go wrong w/ a GMMG or any of the other exhausts mentioned in this thread.

Yea i am going to have cats. What kind of cats are you guys running?

given any thought to hooker? its cheap and it sounds good. i got mine for 285 shipped from thunder racing when i got it

I already bought gmmg. Hooker is to quiet for me anyway.

I already bought gmmg. Hooker is to quiet for me anyway.

Good decision, you wont have any regrets

GMMG Rocks my socks!

A friend of mine has a GMMG on his 97SS. Even with stock manifolds stock cats it still sounds AWESOME!! You hear him coming a mile away!:)