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

Best flowing catback?

Thread Tools
 
Search this Thread
 
Old Dec 30, 2008 | 07:46 PM
  #1  
02BLKWS6MD's Avatar
Thread Starter
TECH Enthusiast
iTrader: (22)
 
Joined: Jun 2006
Posts: 746
Likes: 0
From: Millersville, MD
Default Best flowing catback?

Whats the best flowing catback on the market? I have a corsa catback setup right now and I've had magnaflow, slp loudmouth 1, and TSP true duals but they were too low. I was wondering if there was something out there that flowed better then what I have.
Reply
Old Dec 30, 2008 | 07:52 PM
  #2  
gsxr1k2's Avatar
12 Second Club
iTrader: (6)
 
Joined: Jul 2007
Posts: 399
Likes: 0
From: A Mile High
Default

I've got my new pacesetter Y and TSP Rumbler for 250.00 right now. Pretty much about straight through. Matt at TSP told me the almost see no difference in hp between the True duals and the Rumbler.
Reply
Old Dec 31, 2008 | 08:37 AM
  #3  
02BLKWS6MD's Avatar
Thread Starter
TECH Enthusiast
iTrader: (22)
 
Joined: Jun 2006
Posts: 746
Likes: 0
From: Millersville, MD
Default

no one else?
Reply
Old Dec 31, 2008 | 09:03 AM
  #4  
teke184's Avatar
TECH Junkie
iTrader: (5)
 
Joined: Feb 2007
Posts: 3,183
Likes: 3
From: Key West, Florida
Default

what you have flows pretty well. compared to something like the LM or Rumbler you'd probably only see 1-2hp in all reality.

but the BEST flowing catback would be the 4" mufflex...assuming you put a good muffler on it. i think they come with flowmaster
Reply
Old Dec 31, 2008 | 09:09 AM
  #5  
TXZ28LS1's Avatar
TECH Senior Member
iTrader: (5)
 
Joined: Mar 2004
Posts: 6,163
Likes: 3
From: Classified
Default

i think best flowing would be loudmouth!!! but magnaflow and hooker catbacks are good catbacks as well.
Reply
Old Dec 31, 2008 | 09:25 AM
  #6  
SS1875's Avatar
11 Second Club
iTrader: (34)
 
Joined: Feb 2005
Posts: 3,158
Likes: 0
From: Ft. Wayne, Indiana
Default

My Borla flows rather well....I think they are all pretty close . Would be interesting to see if there is any difference between them when installed on the same car and run on a Dyno.
Reply
Old Dec 31, 2008 | 10:25 AM
  #7  
dondb's Avatar
TECH Apprentice
iTrader: (1)
 
Joined: Feb 2008
Posts: 354
Likes: 0
From: Seacoast of NH
Default

Don't forget to look at the GMMG...it's damn good
Reply
Old Dec 31, 2008 | 11:15 AM
  #8  
teke184's Avatar
TECH Junkie
iTrader: (5)
 
Joined: Feb 2007
Posts: 3,183
Likes: 3
From: Key West, Florida
Default

and darn $$$


"I think they are all pretty close . Would be interesting to see if there is any difference between them when installed on the same car and run on a Dyno"

agreed and AGREED!

figure the worst flowing catback is probably the flowmaster, and my guess would be you'd still see 10hp over stock. best (3" pipe) catback would be either the loudmouth or rumber, and figure those are good for 15hp.

so with the dozens of choices, and only a 5hp range, go with sound, look, and budget.


or better yet....go TDs
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 Dec 31, 2008 | 11:23 AM
  #9  
2001 Pewter WS6's Avatar
Restricted User
iTrader: (43)
 
Joined: Nov 2001
Posts: 2,669
Likes: 1
From: Pittsburgh, PA
Default

I only lost 1rwhp with my Corsa compared to the cutout open in the I pipe. This was on a 383 Stroker. The Corsa flows really well...
Reply
Old Dec 31, 2008 | 04:29 PM
  #10  
02BLKWS6MD's Avatar
Thread Starter
TECH Enthusiast
iTrader: (22)
 
Joined: Jun 2006
Posts: 746
Likes: 0
From: Millersville, MD
Default

yeah I had true duals they were really nice but too low. I think I'm just gonna put an electric cutout on the car.
Reply
Old Jan 15, 2009 | 08:23 PM
  #11  
01 BERGER CAMARO SS's Avatar
TECH Enthusiast
20 Year Member
iTrader: (77)
 
Joined: Feb 2004
Posts: 718
Likes: 0
From: 2 Miles from the Brder Wall, Tx
Default

I think borla, due to the fact you can control how loud it can be with a simple wrench or from a switch if u install an electric cutout. Tips are pretty sweet too
Reply
Old Jan 15, 2009 | 08:27 PM
  #12  
MYSTIC-1SC's Avatar
TECH Junkie
iTrader: (14)
 
Joined: Sep 2007
Posts: 3,277
Likes: 14
Default

i would think the lm1 flows pretty well.
Reply
Old Jan 15, 2009 | 09:55 PM
  #13  
C_B64's Avatar
11 Second Club
iTrader: (7)
 
Joined: Aug 2003
Posts: 302
Likes: 0
From: Weeksbury, Ky
Default

I lose 15 rwhp and 14 rwtq from a cutout to my Hooker Catback
Reply
Old Jan 17, 2009 | 01:20 AM
  #14  
jmilz28's Avatar
TECH Addict
20 Year Member
Liked
Loved
Community Favorite
iTrader: (13)
 
Joined: Feb 2005
Posts: 2,717
Likes: 125
From: Houston, TX
Default

4" Mufflex will flow the most, period, most power potential. They are NOT stainless so will rust eventually and have no tips.
Reply
Old Jan 17, 2009 | 09:05 AM
  #15  
omcar's Avatar
TECH Fanatic
iTrader: (10)
 
Joined: Jun 2006
Posts: 1,333
Likes: 0
From: Pennsylvania
Default

Magnaflow is a straight thru design and can't be beat..
Reply
Old Jan 17, 2009 | 10:47 AM
  #16  
SS DNA's Avatar
TECH Addict
iTrader: (7)
 
Joined: Apr 2004
Posts: 2,187
Likes: 0
From: NorcaL
Smile

I think either a Loudmouth 1 or a GMMG would flow the best.
Reply
Old Jan 17, 2009 | 12:04 PM
  #17  
studderin's Avatar
TECH Senior Member
iTrader: (28)
 
Joined: Nov 2005
Posts: 5,556
Likes: 6
From: Rochester, NY
Default

Also think of the weight, I have a mufflex 3.5 and the thing weight like 2x with my 2OTL weights. thouse things are heavy. Same with some true duels, some of you guys have 70-80#s systems

When I had h/c on my 346, it made 460/408 thu the SLP 20tl, and 466/410 with the 4inch Ipipe open at the end of the TA. Over the smooth blend to 3.5 over the rearend, then 3.25 into the mufflar.
Reply
Old Jan 17, 2009 | 12:15 PM
  #18  
01ssreda4's Avatar
TECH Senior Member
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (96)
 
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
Default

^^^yeah catbacks with full size mufflers can get heavy. i can disconnect my 3 inch duals at the header and hold it and it seems about like thirty pounds but it doesn't even get to the end of the torque arm. the hooker mufflers themselves are supposed to flow really well. i saw a write up one time on flow cfm of mufflers and i believe it was in the top 3 in full sized mufflers.
Reply
Old Jan 17, 2009 | 04:01 PM
  #19  
jmilz28's Avatar
TECH Addict
20 Year Member
Liked
Loved
Community Favorite
iTrader: (13)
 
Joined: Feb 2005
Posts: 2,717
Likes: 125
From: Houston, TX
Default

Originally Posted by omcar
Magnaflow is a straight thru design and can't be beat..
wrong - 3" will not outflow 4". I love the magnaflow but math doesn't lie.
Reply
Old May 17, 2011 | 01:42 PM
  #20  
J-Train's Avatar
Launching!
 
Joined: Oct 2007
Posts: 289
Likes: 0
Default

Originally Posted by jmilz28
wrong - 3" will not outflow 4". I love the magnaflow but math doesn't lie.
Bigger is not always better, flow more yes, but there is something to be said for a little back pressure, depending on mods to the car, 3" may make better numbers than 4"
Reply



All times are GMT -5. The time now is 07:00 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