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

Full cat-back vs muffler

Thread Tools
 
Search this Thread
 
Old Sep 13, 2013 | 05:29 PM
  #1  
Max Rehbein's Avatar
Thread Starter
Teching In
 
Joined: Jul 2012
Posts: 11
Likes: 0
From: Phoenix, AZ
Default Full cat-back vs muffler

So I have called around some exhaust shops to get quote's on how much a custom fabricated exhaust would cost from them and it turns out most of these guys suggest I just get a magnaflow muffler to stock piping. They claim that since the pipes on my stock system are pretty big that unless I am running other stuff on my car there wouldn't be much difference in power from adding new piping from the cat back. Any thoughts on this? I have the weekend to decide and pick a shop. I trust professionals opinions over an ad for X company exhaust ad with HP gains.

Sidenote: I live in Phoenix, Arizona and need this done to my 00 Trans Am, so if any AZ people are looking and have shop suggestions I am interested.
Reply
Old Sep 13, 2013 | 05:42 PM
  #2  
ULTIMATEORANGESS's Avatar
TECH Senior Member
20 Year Member
iTrader: (4)
 
Joined: Mar 2003
Posts: 10,985
Likes: 23
From: eatontown,nj
Smile

most cat back systems have a slightly larger intermediate pipe than a stock system. will you notice anything on a stock vehicle? probably not but its one of your best starting points to adding power.
Reply
Old Sep 13, 2013 | 06:08 PM
  #3  
Max Rehbein's Avatar
Thread Starter
Teching In
 
Joined: Jul 2012
Posts: 11
Likes: 0
From: Phoenix, AZ
Default

Thank you for the input. The only odd thing was that one guy I called said the stock piping was fine if I get an aftermarket muffler 90% of power comes from that switch, then he offered to do the flat pipe under my drivers side because his buddies contest that flat pipe losses a touch of power. I thought that was a nice point to make to show his knowledge on the car.
Reply
Old Sep 13, 2013 | 11:22 PM
  #4  
RevGTO's Avatar
Pontiacerator
20 Year Member
Photogenic
Liked
Loved
iTrader: (12)
 
Joined: Nov 2003
Posts: 6,216
Likes: 236
From: Wichita KS / Rancho San Diego
Default

Hooker makes a direct fit Aerochamber to the stock piping and Magnaflow may also. If you're keeping the stock manifolds & cats and Y-pipe, that's good way to go. If you're planning to move up to LT's or anything beyond that, I'd go with a full catback, which has a 3" I-pipe and 2.5" tailpipes vs. stock 2.75"/2.25".
Reply
Old Sep 14, 2013 | 08:26 AM
  #5  
RockinWs6's Avatar
TECH Addict
 
Joined: Mar 2013
Posts: 2,628
Likes: 30
Default

I just had a Flowmaster Stainless crossflow replacement muffler installed in my stock system and it ROCKS. Sound is fantastic and it runs much better all around.

I drove a 02 Z28 that just had a Magnaflow complete exhaust system installed and it sounded good too and ran excellent. Quite an improvement over the stock system.

Honestly I don't think there is enough difference in power or sound in either. Both sounded great. I personally like the way the Flowmaster pulls down low, the Magnaflow pulls a slight bit better up high but its almost nothing more.

Flowmaster has a classic muscle car sound everyone digs without any drone plus its just loud enough to be noticed. The Magnaflow has a modern sound and is not quite as loud.

I've also heard the Hooker cat back and Hooker muffler<sounds fantastic! BUT it doesn't come in stainless AND their quality is poor.
Reply
Old Sep 14, 2013 | 11:22 AM
  #6  
MikeWS6's Avatar
TECH Addict
 
Joined: Apr 2009
Posts: 2,354
Likes: 2
Default

Stock catback with a cut out.
Reply
Old Sep 14, 2013 | 01:33 PM
  #7  
Fry_'s Avatar
TECH Fanatic
 
Joined: Aug 2011
Posts: 1,324
Likes: 6
From: Marengo, Ia
Default

Originally Posted by revgto
hooker makes a direct fit aerochamber to the stock piping and magnaflow may also. If you're keeping the stock manifolds & cats and y-pipe, that's good way to go. If you're planning to move up to lt's or anything beyond that, i'd go with a full catback, which has a 3" i-pipe and 2.5" tailpipes vs. Stock 2.75"/2.25".
+1...
Reply
Old Sep 16, 2013 | 04:19 PM
  #8  
Max Rehbein's Avatar
Thread Starter
Teching In
 
Joined: Jul 2012
Posts: 11
Likes: 0
From: Phoenix, AZ
Default

Thanks all for the advice, I think I'll still get one fabricated but with 3" piping all the way to a magnaflow muffler. Time will come for LT but I don't have enough cash since I need a Y-pipe with cats for emissions in Phoenix... College money problems here!
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

 Brett Foote
story-1

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-2

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-3

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-4

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-5

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-6

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

 Verdad Gallardo
story-7

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-8

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-9

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
Old Sep 17, 2013 | 09:59 AM
  #9  
mean_greenZ's Avatar
TECH Fanatic
iTrader: (1)
 
Joined: Oct 2007
Posts: 1,142
Likes: 1
Default

Magnaflow replacement w/ cutout or dynomax catback is my vote
Reply
Old Sep 17, 2013 | 02:21 PM
  #10  
Fry_'s Avatar
TECH Fanatic
 
Joined: Aug 2011
Posts: 1,324
Likes: 6
From: Marengo, Ia
Default

You can get a 3 inch i-pipe and over the axle pipe from Rock Auto for $110 and they're mandrel bent, most shop's can only do crush bends which reduce flow.
Reply




All times are GMT -5. The time now is 02:51 PM.

story-0
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-04 18:13:20


VIEW MORE
story-1
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-2
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-3
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-4
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-5
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-6
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-7
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-8
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-9
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