LS4 Performance Grand Prix GXP | Monte Carlo SS | Impala SS | LaCrosse Super

3" mandrel bent exhaust

Thread Tools
 
Search this Thread
 
Old Dec 20, 2010 | 04:35 PM
  #1  
1BAD06MCSS's Avatar
Thread Starter
TECH Regular
 
Joined: Sep 2010
Posts: 428
Likes: 0
From: Kansas City MO
Default 3" mandrel bent exhaust

Hey all! I was looking at getting this when my headers get in. Does anyone sell kits or could I just go to an exhaust shop and have them fab one up for me?
Reply
Old Dec 20, 2010 | 04:46 PM
  #2  
2005gxp's Avatar
TECH Resident
 
Joined: May 2010
Posts: 803
Likes: 0
From: Ontario, Canada
Default

im currently selling mine, but im in canada lol
Reply
Old Dec 20, 2010 | 05:18 PM
  #3  
monte_with_a_LS4's Avatar
TECH Fanatic
iTrader: (4)
 
Joined: Mar 2010
Posts: 1,124
Likes: 0
From: Springfield, IL
Default

you could get the slp. its cheaper than the magnaflow
Reply
Old Dec 20, 2010 | 06:47 PM
  #4  
1BAD06MCSS's Avatar
Thread Starter
TECH Regular
 
Joined: Sep 2010
Posts: 428
Likes: 0
From: Kansas City MO
Default

I like my magna flo's and would like to keep them. I just want to upgrade the piping before the mufflers. I have the basic magna flo kit. It's the 2.5 kit.
Reply
Old Dec 20, 2010 | 07:30 PM
  #5  
AlabamaGuy's Avatar
TECH Addict
iTrader: (5)
 
Joined: Jun 2009
Posts: 2,802
Likes: 0
Default

3 inch is the way to go.
Reply
Old Dec 21, 2010 | 09:25 AM
  #6  
indynotch50's Avatar
Launching!
 
Joined: Mar 2010
Posts: 265
Likes: 0
From: Morristown, IN
Default

I went to a local shop, the guy there said it would be about $200 and some change maybe to run 3 inch from my header to my muffler, put the tips on and install an O2 bung.
This also comes from a highly recommended shop. However, it took some time. I went to 4 or 5 places before I found this one and was comfortable enough to let him work on my car (he said it would take 2 hours or so but he wanted an extra hour to be able to go through and make sure there weren't any quality issues).
Reply
Old Dec 21, 2010 | 09:55 AM
  #7  
DavidGXP's Avatar
12 Second Club
iTrader: (14)
 
Joined: Jun 2007
Posts: 2,563
Likes: 0
From: Renton, WA
Default

Pacesetter has a kit fir the older grand prixs that will fit you would just need to replace the tips. But for 200 that's a steal. I paid over 700 for my custom setup
Reply
Old Dec 22, 2010 | 06:54 AM
  #8  
indynotch50's Avatar
Launching!
 
Joined: Mar 2010
Posts: 265
Likes: 0
From: Morristown, IN
Default

That's just to run the piping and put my pieces together. With the headers, mufflers and tailpipes (which i have not found yet) I'll have well over that invested.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

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

 Verdad Gallardo
story-1

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

 Pouria Savadkouei
story-2

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

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

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

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Dec 22, 2010 | 10:55 AM
  #9  
DavidGXP's Avatar
12 Second Club
iTrader: (14)
 
Joined: Jun 2007
Posts: 2,563
Likes: 0
From: Renton, WA
Default

Adds up real quick lol
Reply
Old Dec 22, 2010 | 01:12 PM
  #10  
AlabamaGuy's Avatar
TECH Addict
iTrader: (5)
 
Joined: Jun 2009
Posts: 2,802
Likes: 0
Default

Originally Posted by DavidGXP
Adds up real quick lol
No kidding. Just talk to some of us that are on our 4th+ exhaust setup. I have enough money in my exhaust to nearly up and buy the cartuning kit. I'm still not done. It's getting closer to where I want it but it still isn't "right".
Reply
Old Dec 22, 2010 | 07:34 PM
  #11  
DieselPump's Avatar
Launching!
iTrader: (8)
 
Joined: Jun 2007
Posts: 214
Likes: 0
From: Canada
Default

Originally Posted by AlabamaGuy
No kidding. Just talk to some of us that are on our 4th+ exhaust setup. I have enough money in my exhaust to nearly up and buy the cartuning kit. I'm still not done. It's getting closer to where I want it but it still isn't "right".
I hear that, I'm in the same boat with how many times I've got it done.

Finally got exactly what I wanted about a month ago
Reply
Old Dec 22, 2010 | 08:48 PM
  #12  
Nacho SS's Avatar
TECH Junkie
iTrader: (4)
 
Joined: Feb 2007
Posts: 3,560
Likes: 0
From: 805-818
Default

Originally Posted by AlabamaGuy
No kidding. Just talk to some of us that are on our 4th+ exhaust setup. I have enough money in my exhaust to nearly up and buy the cartuning kit. I'm still not done. It's getting closer to where I want it but it still isn't "right".
Still sounds like a truck
Reply
Old Dec 22, 2010 | 09:10 PM
  #13  
AlabamaGuy's Avatar
TECH Addict
iTrader: (5)
 
Joined: Jun 2009
Posts: 2,802
Likes: 0
Default

Originally Posted by Nacho SS
Still sounds like a truck
It's actually very un-trucklike most of the time now.
Reply
Old Dec 22, 2010 | 10:19 PM
  #14  
evil 5.3's Avatar
TECH Apprentice
 
Joined: Nov 2010
Posts: 307
Likes: 0
From: bear,delaware
Default

how much on the bottom do you lose with 3 inch
Reply
Old Dec 22, 2010 | 10:21 PM
  #15  
GXP25's Avatar
TECH Fanatic
iTrader: (3)
 
Joined: Aug 2009
Posts: 1,392
Likes: 0
From: Orlando, FL
Default

Originally Posted by evil 5.3
how much on the bottom do you lose with 3 inch
I'd welcome some low-end torque loss.
Reply
Old Dec 22, 2010 | 10:22 PM
  #16  
AlabamaGuy's Avatar
TECH Addict
iTrader: (5)
 
Joined: Jun 2009
Posts: 2,802
Likes: 0
Default

Originally Posted by GXP25
I'd welcome some low-end torque loss.
No kidding...
Reply
Old Dec 22, 2010 | 11:12 PM
  #17  
evil 5.3's Avatar
TECH Apprentice
 
Joined: Nov 2010
Posts: 307
Likes: 0
From: bear,delaware
Default

ok then how much of a difference is it on the top end
Reply
Old Dec 22, 2010 | 11:32 PM
  #18  
AlabamaGuy's Avatar
TECH Addict
iTrader: (5)
 
Joined: Jun 2009
Posts: 2,802
Likes: 0
Default

It's one of those things that if you're going to keep modifying the car, you need to go ahead and get it out of the way. I don't have any numbers to back up my 3" exhaust.
Reply
Old Dec 23, 2010 | 12:07 AM
  #19  
evil 5.3's Avatar
TECH Apprentice
 
Joined: Nov 2010
Posts: 307
Likes: 0
From: bear,delaware
Default

well what about a seat of the pants dyno i have seen test that one 3inch is better flow wise then dual 2.5 now this was on a ls1 ss camaro in 98 or 99 The only thing is i know you can over exhaust a car and i dont want to make that mistake and i do want to keep modding i want a 12.99 out of the car n/a worst i spray the hell out it It happens
Reply
Old Dec 23, 2010 | 12:09 AM
  #20  
AlabamaGuy's Avatar
TECH Addict
iTrader: (5)
 
Joined: Jun 2009
Posts: 2,802
Likes: 0
Default

Originally Posted by evil 5.3
well what about a seat of the pants dyno i have seen test that one 3inch is better flow wise then dual 2.5 now this was on a ls1 ss camaro in 98 or 99 The only thing is i know you can over exhaust a car and i dont want to make that mistake and i do want to keep modding i want a 12.99 out of the car n/a worst i spray the hell out it It happens
Good luck with the 12.99 all motor.


Having said that, you can over exhaust a car but 3" isn't going to do it on a 325 cube motor spinning to 6000rpm.
Reply



All times are GMT -5. The time now is 01:03 AM.

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