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

What do you think of this exhaust setup?

Thread Tools
 
Search this Thread
 
Old Aug 17, 2009 | 11:18 AM
  #1  
street demon2k3's Avatar
Thread Starter
12 Second Club
iTrader: (3)
 
Joined: Aug 2003
Posts: 591
Likes: 0
From: Palmview, Tx
Default What do you think of this exhaust setup?

I'm going to get my exhaust done this week now that the wifey approved of my new '98 TransAm that I acuired through a trade. It was bone stock with the exception of 3.73's until I was able to work on it this weekend; got an SLP lid, P&P TB, free ram air mod, EGR mod, raised & modded lower lid base and MSD wires. Off to a great start with just under $50 that I spent on the lid, wires(got a good deal on them LOL!) and misc crap for the free mods.

Im trying to keep the costs down as much as possible so my wifey doesn't get on my case; this is what I'm planning for the exhaust.

3'' ORY, no cats, 2.5" or 3" Magnaflow bullet then out the back. Essentially a Magnamouth setup.

Is it worth going to a 3" in/out muffler even if both are straight through designs? I know the 2.5" muffler will sound quiter which is what I'm looking for but will it hurt performance any even though its not restrictive at all.
Reply
Old Aug 17, 2009 | 11:22 AM
  #2  
twitchtwice's Avatar
12 Second Club
iTrader: (12)
 
Joined: May 2008
Posts: 2,612
Likes: 1
Default

you can always just put a bullet at the end of a the y and dump it at the axles. that will be easier and cheaper
Reply
Old Aug 17, 2009 | 11:38 AM
  #3  
tals7's Avatar
10 Second Club
 
Joined: Jun 2009
Posts: 399
Likes: 0
From: se mich(pluto)
Smile

with your mods it will fine.
Reply
Old Aug 17, 2009 | 12:00 PM
  #4  
teke184's Avatar
TECH Junkie
iTrader: (5)
 
Joined: Feb 2007
Posts: 3,183
Likes: 3
From: Key West, Florida
Default

i would go with a smaller ORY to keep clearance reasonable. or at least notch the tubing where it passes under the frame. you won't lose enough area to affect power but could easily gain 1/2-3/4" of clearance.

DEFINATLY run a 3" in/out muffler. i can't imagine it would make a difference in sound going smaller...but it could easily rob a little power. going from 3" to 2.5" is a 30% reduction in cross-sectional area...HUGE!!

i ran an 18" bullet off my Ypipe, then a 3" i-pipe back over the axle into a 24" bullet and put a turn down on it under the trunk. sounded really good and made nice power.

was a little raspy...but with no cats and a decent cam it was expected.
Reply
Old Aug 17, 2009 | 12:41 PM
  #5  
street demon2k3's Avatar
Thread Starter
12 Second Club
iTrader: (3)
 
Joined: Aug 2003
Posts: 591
Likes: 0
From: Palmview, Tx
Default

I'm leaning towards dumping the exhaust till I can afford some Corsa clones. I will notch the y-pipe to clear the floorboard since I've always had problems with it in the past on my other F-bodies. I'll buy the 3" unit since it will leave some room for future mods and hopefully doesn't sound too loud. Anyone know where to get the magnaflow bullet for cheap?
Reply
Old Aug 17, 2009 | 12:47 PM
  #6  
tals7's Avatar
10 Second Club
 
Joined: Jun 2009
Posts: 399
Likes: 0
From: se mich(pluto)
Smile

jegs/summit.get a bump stop for y banging or poly motor mounts.
Reply
Old Aug 17, 2009 | 01:43 PM
  #7  
teke184's Avatar
TECH Junkie
iTrader: (5)
 
Joined: Feb 2007
Posts: 3,183
Likes: 3
From: Key West, Florida
Default

def get the poly mounts....i run my exhaust 1/4" from my frame and have no rubbing issues.

watch Ebay for the mufflers...or just suck up the extra few bucks and do Summit/jegs
Reply
Old Aug 17, 2009 | 02:20 PM
  #8  
street demon2k3's Avatar
Thread Starter
12 Second Club
iTrader: (3)
 
Joined: Aug 2003
Posts: 591
Likes: 0
From: Palmview, Tx
Default

Anyone had experience with the shipping services from Ebay vendors? The price there would be slightly cheaper and they offer free shipping; Summit has great shipping but is more expensive.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

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

 Pouria Savadkouei
story-1

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

 Verdad Gallardo
story-2

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-3

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

 Verdad Gallardo
story-4

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

 Pouria Savadkouei
story-5

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

 Verdad Gallardo
story-6

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-7

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-8

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-9

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

 Verdad Gallardo
Old Aug 17, 2009 | 02:33 PM
  #9  
tals7's Avatar
10 Second Club
 
Joined: Jun 2009
Posts: 399
Likes: 0
From: se mich(pluto)
Smile

ebay sometimes hit or miss.remember you get what you pay for most of the time.
Reply
Old Aug 17, 2009 | 04:54 PM
  #10  
street demon2k3's Avatar
Thread Starter
12 Second Club
iTrader: (3)
 
Joined: Aug 2003
Posts: 591
Likes: 0
From: Palmview, Tx
Default

Bought the 3" Magnaflow round muffler, should have it on the car by thursday if it gets here early enough. Until then, I'll keep you guys posted on the exhaust setup.
Reply
Old Aug 17, 2009 | 05:18 PM
  #11  
teke184's Avatar
TECH Junkie
iTrader: (5)
 
Joined: Feb 2007
Posts: 3,183
Likes: 3
From: Key West, Florida
Default

how big around is that muffler? i was thinking it was 5"

may have ended up with better clearance and a little better sound with a 4x9.

interested to see how it goes.
Reply
Old Aug 17, 2009 | 05:58 PM
  #12  
street demon2k3's Avatar
Thread Starter
12 Second Club
iTrader: (3)
 
Joined: Aug 2003
Posts: 591
Likes: 0
From: Palmview, Tx
Default

I got the #14419 which I think is 4" case which should still have a nice tone to it but with decent clearance. My '93 TransAm had a similar setup with an XR-1 but the clearance wasn't that good cuz I tucked it up real close to the floorboard because of the 5" case. I'm gonna get pics and a vid soon, can't wait!
Reply
Old Aug 17, 2009 | 09:39 PM
  #13  
teke184's Avatar
TECH Junkie
iTrader: (5)
 
Joined: Feb 2007
Posts: 3,183
Likes: 3
From: Key West, Florida
Default

oh cool...thought it was 5" round

def get vids
Reply




All times are GMT -5. The time now is 03:44 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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