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

Will 2001 Headers work on a 1999?

Old Jan 4, 2004 | 06:18 PM
  #1  
Ferocity02's Avatar
Thread Starter
TECH Senior Member
iTrader: (60)
 
Joined: Apr 2003
Posts: 9,397
Likes: 4
Default Will 2001 Headers work on a 1999?

I found a decent price on some used MAC headers and was just wondering what the difference is between the ones for the 1999 cars and the ones for the 2001 cars. Is there any difference in the y-pipe also? Thanks
Reply
Old Jan 4, 2004 | 06:31 PM
  #2  
TWISTA TA's Avatar
WARNING: BAD TRADER STATUS
 
Joined: Dec 2003
Posts: 250
Likes: 0
From: California
Default

99 ls1 have egr hook ups and 01's dont. The y pipe should be the same the 99 and 01 cars both have o2's before and after the cats. If you are putting a 01 on a 99 you can use an egr block off plate or even take the egr out all together. You might need to have your computer tunned to get the most out of your power.
Reply
Old Jan 4, 2004 | 06:33 PM
  #3  
Ferocity02's Avatar
Thread Starter
TECH Senior Member
iTrader: (60)
 
Joined: Apr 2003
Posts: 9,397
Likes: 4
Default

I plan on getting it tuned after the headers to get some more power out of my cam. If I block off the EGR, won't I get an SES light? I have to re-install all of the stock stuff for emmisions so nothing can be permanent. Thanks
Reply
Old Jan 4, 2004 | 06:40 PM
  #4  
TWISTA TA's Avatar
WARNING: BAD TRADER STATUS
 
Joined: Dec 2003
Posts: 250
Likes: 0
From: California
Default

You will get a ses light but you can have that deleted with ls1 edit. The block of plates are bolted on so they can be removed and turned back to stock if you had to pass emissions.
Reply
Old Jan 4, 2004 | 07:10 PM
  #5  
jose's Avatar
Teching In
 
Joined: Jan 2004
Posts: 6
Likes: 0
Default

what is the ls1 edit.
Reply
Old Jan 4, 2004 | 07:37 PM
  #6  
Ferocity02's Avatar
Thread Starter
TECH Senior Member
iTrader: (60)
 
Joined: Apr 2003
Posts: 9,397
Likes: 4
Default

Originally Posted by jose
what is the ls1 edit.
It's a computer program that allows you to tune your PCM, along with set shift points, rev limiters, and much more.
Reply
Old Jan 4, 2004 | 07:56 PM
  #7  
jose's Avatar
Teching In
 
Joined: Jan 2004
Posts: 6
Likes: 0
Default

thank you ferocityo2 now i know what a ls1 edit is. but where do i get one if you know
Reply
Old Jan 4, 2004 | 07:59 PM
  #8  
Ferocity02's Avatar
Thread Starter
TECH Senior Member
iTrader: (60)
 
Joined: Apr 2003
Posts: 9,397
Likes: 4
Default

I don't know off the top of my head, try some of the sponsors...

I have my own question, say I "delete" the EGR code or whatever you delete, will the EGR system still function if I decide to put the EGR tube and what not back on the car? Or do I need LS1Edit again to make it work.
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 Jan 4, 2004 | 08:25 PM
  #9  
TWISTA TA's Avatar
WARNING: BAD TRADER STATUS
 
Joined: Dec 2003
Posts: 250
Likes: 0
From: California
Default

You would have to reprogram it again with ls1 edit or else the computer would be confused.
Reply
Old Jan 4, 2004 | 08:28 PM
  #10  
TWISTA TA's Avatar
WARNING: BAD TRADER STATUS
 
Joined: Dec 2003
Posts: 250
Likes: 0
From: California
Default

You can get ls1 edit at this link; http://www.carputing.com/
Reply


Thread Tools
Search this Thread

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

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