Generation III External Engine LS1 | LS6 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

Best flowing 3" catback?

Thread Tools
 
Search this Thread
 
Old Nov 11, 2002 | 05:04 PM
  #1  
WMSuperSport's Avatar
Thread Starter
TECH Fanatic
iTrader: (23)
 
Joined: Feb 2002
Posts: 1,011
Likes: 0
From: Ft. Worth, TX
Default Best flowing 3" catback?

Im already tired of straight pipes so I am going back to a stock style exhaust with Hooker LTs and Off road pipe. What's a good sounding catback that flows really well as well?

(Helps to be cheap and light too) <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Reply
Old Nov 11, 2002 | 05:34 PM
  #2  
Cody Brooks's Avatar
TECH Resident
iTrader: (2)
 
Joined: Apr 2002
Posts: 816
Likes: 1
From: Ardmore, Oklahoma
Default Re: Best flowing 3" catback?

hooker cat-back cheap one of the best flowing and sounds good.

$270 at some places
Reply
Old Nov 11, 2002 | 05:44 PM
  #3  
ratio411's Avatar
TECH Enthusiast
 
Joined: Jul 2002
Posts: 618
Likes: 0
From: Pensacola, FL
Default Re: Best flowing 3" catback?

The Loudmouth is the best flowing. 2200+ cfm.
#2 is Magnaflow at about 1100 cfm.
The rest are in between Flowmaster (350 cfm) and Magnaflow. Borla flows around 900 cfm. I forgot what Hooker flows. It is in the Borla neighborhood.
Dave
Reply
Old Nov 11, 2002 | 05:50 PM
  #4  
WJ SOM SS's Avatar
TECH Junkie
iTrader: (11)
 
Joined: Jan 2002
Posts: 3,489
Likes: 0
From: Paxton, Ma.
Default Re: Best flowing 3" catback?

What does the SLP Dual-Dual flow? Thanks. WJ. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Reply
Old Nov 11, 2002 | 06:00 PM
  #5  
WMSuperSport's Avatar
Thread Starter
TECH Fanatic
iTrader: (23)
 
Joined: Feb 2002
Posts: 1,011
Likes: 0
From: Ft. Worth, TX
Default Re: Best flowing 3" catback?

What about the Loudmouth with say a Flowmaster muffler? Would the Flowmaster muffler restrict alot of flow?
Reply
Old Nov 11, 2002 | 06:43 PM
  #6  
ratio411's Avatar
TECH Enthusiast
 
Joined: Jul 2002
Posts: 618
Likes: 0
From: Pensacola, FL
Default Re: Best flowing 3" catback?

The pipes are all about the same. It is the muffler itself that is either free flowing or not.
So, yes the Flowmaster muffler would plug up a Loudmouth.
Dave
Reply
Old Nov 12, 2002 | 01:20 AM
  #7  
NO F-BDY BS's Avatar
Launching!
 
Joined: Nov 2002
Posts: 207
Likes: 0
From: S'port
Default Re: Best flowing 3" catback?

IMO, if you dont care about how the tips look, then pick the cheapest one, they all sound about the same(like ****,u cant make a LS1 sound good), I had the Corsa system on my car, sounded just like my friend who had a flowmaster welded up under his, which sounded just like my other friends B&B, which sounded just like my other friend who has a loudmouth,only quieter.Also, I have seen almost all the systems on the dyno, and there is not 3hp difference between the best and worst.

<small>[ November 12, 2002, 01:21 AM: Message edited by: NO F-BDY BS ]</small>
Reply
Old Nov 12, 2002 | 06:48 AM
  #8  
unit213's Avatar
Administrator
20 Year Member
 
Joined: Jan 2002
Posts: 45,841
Likes: 5
From: Earth
Default Re: Best flowing 3" catback?

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by NO F-BDY BS:
<strong>IMO, if you dont care about how the tips look, then pick the cheapest one, they all sound about the same(like ****,u cant make a LS1 sound good), I had the Corsa system on my car, sounded just like my friend who had a flowmaster welded up under his, which sounded just like my other friends B&B, which sounded just like my other friend who has a loudmouth,only quieter.Also, I have seen almost all the systems on the dyno, and there is not 3hp difference between the best and worst.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Great, another troll who can't afford an LS1. I'm sure you'll have alot to contribute to the board. <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" /> You should hang out in the kill forum with the other LS1 haters since you obviously have no technical knowledge.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-1

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-2

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-3

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-4

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-5

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-6

10 Camaros You Should Never Buy

 
story-7

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
story-8

Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0

 Brett Foote
story-9

10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever

 Verdad Gallardo
Old Nov 12, 2002 | 08:44 AM
  #9  
Vengeance Racing's Avatar
LS1TECH Sponsor
 
Joined: Jun 2002
Posts: 636
Likes: 1
From: Cumming, GA
Default Re: Best flowing 3" catback?

GMMG CHambered <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
Reply
Old Nov 12, 2002 | 09:02 AM
  #10  
ZippyZ28's Avatar
Launching!
 
Joined: Aug 2002
Posts: 209
Likes: 0
From: Lancaster Pa
Default Re: Best flowing 3" catback?

SLP 2otl is light, flows well, and isnt too obnoxious
Reply
Old Nov 12, 2002 | 10:21 AM
  #11  
DinoZ's Avatar
TECH Resident
iTrader: (5)
 
Joined: Jul 2002
Posts: 769
Likes: 0
From: Tampa FL
Default Re: Best flowing 3" catback?

I have to agree with a few of the guys above...

I myself went with the Dynomouth, which flows the same as the Loudmouth.

GMMG makes an awesome sounding cat-back, that looks good, and flows good.

I had the SLP 2OTL on my 96 (I know, LT1), and it sounded awesome before and after I added the headers and ORP. I am not sure about the flow, but it was light and sounded great!
Reply
Old Nov 12, 2002 | 01:29 PM
  #12  
INSSANE's Avatar
TECH Fanatic
 
Joined: Dec 2001
Posts: 1,114
Likes: 0
From: Way the hell in front of you
Default Re: Best flowing 3" catback?

I too am tired of straight pipes...they sound sweet (see sig), but the drone after 2 years is getting to me.
I am gonna do ORY with stock muffler and dual cutouts. That should work.

If you want a sweet sounding exhaust just weld a baffled muffler from sweet thunder(?) in the I pipe. It's just like a GMMG only a little louder because not so many baffles. That and a HUGE cam should make the car sound unbelievable.
The baffled mufflers are around $60ish.
Nick
Reply
Old Nov 12, 2002 | 02:04 PM
  #13  
scot's Avatar
Staging Lane
 
Joined: Sep 2002
Posts: 62
Likes: 0
From: mass
Default Re: Best flowing 3" catback?

GMMG Group purchase only till 11/15 $650 includes shipping, up to $50 rebate if enough people buy in.F-body hideout.com Flows as good or better than any, sounds right to me.
Reply
Old Nov 12, 2002 | 02:39 PM
  #14  
Fletch's Avatar
Staging Lane
 
Joined: Jan 2002
Posts: 97
Likes: 0
From: Houston
Default Re: Best flowing 3" catback?

I have a bullit 3" muffler with 3" off the y-pipe headed out the driverside. Cost: $75.00 TOTAL.

Sounds awesome and performs well. Dont have any flow #'s but I'm sure its on up there with the SLP LM since its the same damn thing.
Reply
Old Nov 12, 2002 | 04:20 PM
  #15  
ratio411's Avatar
TECH Enthusiast
 
Joined: Jul 2002
Posts: 618
Likes: 0
From: Pensacola, FL
Default Re: Best flowing 3" catback?

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by INSSANE:
<strong>If you want a sweet sounding exhaust just weld a baffled muffler from sweet thunder(?) in the I pipe.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">The problem with a chambered muffler in the I-pipe is that they are only available in sizes up to 2.5". Then the pipe is pinched to further reduce it's size to make the 'chambers'. That would be a real bottleneck in a 2.75" or 3" I-pipe.
Dave
Reply
Old Nov 12, 2002 | 04:21 PM
  #16  
hondakiller's Avatar
TECH Resident
iTrader: (3)
 
Joined: Mar 2002
Posts: 919
Likes: 0
From: wilmington delaware
Default Re: Best flowing 3" catback?

which plate was in the borla when it was flowed? i find it kinda hard to believe that if it had the wide open plate in there that the loudmouth would still outflow it by more than twice as much.
Reply
Old Nov 12, 2002 | 04:27 PM
  #17  
ratio411's Avatar
TECH Enthusiast
 
Joined: Jul 2002
Posts: 618
Likes: 0
From: Pensacola, FL
Default Re: Best flowing 3" catback?

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by NO F-BDY BS:
<strong>IMO, if you dont care about how the tips look, then pick the cheapest one, they all sound about the same(like ****,u cant make a LS1 sound good), I had the Corsa system on my car, sounded just like my friend who had a flowmaster welded up under his, which sounded just like my other friends B&B, which sounded just like my other friend who has a loudmouth,only quieter.Also, I have seen almost all the systems on the dyno, and there is not 3hp difference between the best and worst.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Hey, welcome to the board!
You have a point, unless you have a cam, most LS1s sound very much alike. Also you point out that most of the aftermarket systems make about the same power, hit the nail on the head again...
Just because the Flowmaster's flow numbers suck, the muffler still only makes just a couple horse less than the best of the best mufflers or even a cutout. What it comes down to is get the sound you like and can afford.
Dave

Btw: Don't worry about folks who make comments when they haven't even read your post... It's obvious that you do have an LS1 from what you wrote.
Reply
Old Nov 12, 2002 | 04:35 PM
  #18  
Sunset Orange 02 Z28's Avatar
Teching In
 
Joined: Nov 2002
Posts: 3
Likes: 0
From: Chatsworth California
Default Re: Best flowing 3" catback?

Magnaflow. I have one on my 2002 Z28 it is the best mod ive done so far. Its also fully polished. I actually have one in the for sael section. Brand new in the box shipped for $300. If your interested, let me know. I also have some movies clips of my car so you can hear the exhaust. Thanx!
Reply
Old Nov 12, 2002 | 06:51 PM
  #19  
NO F-BDY BS's Avatar
Launching!
 
Joined: Nov 2002
Posts: 207
Likes: 0
From: S'port
Default Re: Best flowing 3" catback?

For the price, you cant beat the Magnaflow.The only thing that Corsa, and B&B have is the snazzy looking tips, I had the Corsa on my car, and have recently taken it off and sold it and replaced it with a 3" Sweet thunder Muffler in the I Pipe,and I swear, it sounds almost identical to the Corsa If I were to run LTs without cats, then the Loudmouth/Dynomouth/Sweet Thunder setup would be out of the question for me I have found those to be a little loud for my taste.Others may have different opinions. I can see how you can argue quality,fitment, and price,and to a lesser extent, sound, but to argue power output between the various catbacks is a beaten topic.
]I think it was CAMAROLS1 that called me a troll, well, you can blow me, kiss my ***, get bent,suck my dick,ect.Because if you think that catback selection is actually going to make a difference on how your car runs, then you need to spend a little more time at the track, and less time stressing a point just because this is your first sports car.

<small>[ November 12, 2002, 06:55 PM: Message edited by: NO F-BDY BS ]</small>
Reply
Old Nov 13, 2002 | 01:33 PM
  #20  
Chris Spiess's Avatar
TECH Enthusiast
 
Joined: Nov 2001
Posts: 617
Likes: 0
From: Milford, Ohio
Default Re: Best flowing 3" catback?

Nobody has mentioned Dynomax. The straight through Ultra Flo mufflers flow very well, they're inexpensive - I pieced together my cat-back for less than $200 - and sound decent.
Reply



All times are GMT -5. The time now is 07:10 AM.

story-0
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-1
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-2
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-3
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-4
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-5
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-6
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-7
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE
story-8
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0

The world was a better place when it was still around.

By Brett Foote | 2026-01-23 09:20:37


VIEW MORE
story-9
10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever

Slideshow: The 7.0-liter LS7 was designed for absolute cutting-edge performance.

By Verdad Gallardo | 2026-01-07 18:36:00


VIEW MORE