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

Installing Mac headers have questions..

Thread Tools
 
Search this Thread
 
Old Feb 19, 2004 | 04:34 PM
  #1  
98SS Blackattack's Avatar
Thread Starter
TECH Fanatic
 
Joined: Jun 2002
Posts: 1,227
Likes: 0
From: Indianapolis
Default Installing Mac headers have questions..

Have a few ?'s I thought the lines for Air were different on a 98 than a 2002. I have 2002 headers and the air hookups look the same. I read somewhwere that said all mac headers have egr hookups. I dont see any. Im getting rid of it anyway. And last- Does anyone have a write up on installing Macs. I know i will have to remove the coil packs and other stuff, but what else? Thanks Tony
Reply
Old Feb 19, 2004 | 04:56 PM
  #2  
Steve98Z's Avatar
TECH Regular
 
Joined: Nov 2001
Posts: 450
Likes: 0
From: Texas
Default

Originally Posted by 98SS Blackattack
Have a few ?'s I thought the lines for Air were different on a 98 than a 2002. I have 2002 headers and the air hookups look the same. I read somewhwere that said all mac headers have egr hookups. I dont see any. Im getting rid of it anyway. And last- Does anyone have a write up on installing Macs. I know i will have to remove the coil packs and other stuff, but what else? Thanks Tony
Glad to here you finally got you a set headers, as far as the install go ahead and take the packs and valve covers off and drop them in from the top. I have put a few sets on and they will both drop in from the to with the pass. side being the hardest.
Reply
Old Feb 19, 2004 | 05:05 PM
  #3  
jrp's Avatar
jrp
SN95 Director
20 Year Member
iTrader: (16)
 
Joined: Jul 2003
Posts: 10,755
Likes: 7
From: Valencia, Ca
Default

i could of sworn you had macs already, must be reading things

the 98-99 and 00-02 tubes look the same, there just at a different angle. mac makes 98-99 an 01-02 headers, so obviously the 01+ dont have the egr.
Reply
Old Feb 19, 2004 | 05:15 PM
  #4  
Benjamin Russick's Avatar
TECH Fanatic
iTrader: (1)
 
Joined: Nov 2001
Posts: 1,493
Likes: 0
From: Chesapeake, VA
Default

Drop in both sides from the top with all coil packs removed and passenger side valve-cover off. Pretty easy install, just time consuming and knuckle-skinning...
Reply
Old Feb 19, 2004 | 05:22 PM
  #5  
98SS Blackattack's Avatar
Thread Starter
TECH Fanatic
 
Joined: Jun 2002
Posts: 1,227
Likes: 0
From: Indianapolis
Default

Do i need a new valve cover Gasket. They have 2k on them.
Reply
Old Feb 20, 2004 | 12:57 PM
  #6  
Benjamin Russick's Avatar
TECH Fanatic
iTrader: (1)
 
Joined: Nov 2001
Posts: 1,493
Likes: 0
From: Chesapeake, VA
Default

No new gasket needed. Just make sure that you torque everything to specs...
Reply
Old Feb 20, 2004 | 04:30 PM
  #7  
WILWAXU's Avatar
TECH Senior Member
20 Year Member
iTrader: (6)
 
Joined: Nov 2001
Posts: 14,378
Likes: 1
From: League City, TX
Default

Originally Posted by 98SS Blackattack
Do i need a new valve cover Gasket. They have 2k on them.
not needed...

Just make sure they are seated in the cover. Seen them twist up...
Reply
Old Feb 20, 2004 | 04:47 PM
  #8  
98SS Blackattack's Avatar
Thread Starter
TECH Fanatic
 
Joined: Jun 2002
Posts: 1,227
Likes: 0
From: Indianapolis
Default

Cool. Thanks for the feedback guys. Doesnt sound too bad.
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 Feb 21, 2004 | 09:42 AM
  #9  
Benjamin Russick's Avatar
TECH Fanatic
iTrader: (1)
 
Joined: Nov 2001
Posts: 1,493
Likes: 0
From: Chesapeake, VA
Default

It's not...just take your time. You might want to remove the cowl fasteners as they are razor-sharp and will cut you when you are fumbling around at the back of the valve covers. I would also not even bother trying to reinstall the rearmost coil-pack bolts...
Reply
Old Feb 21, 2004 | 04:56 PM
  #10  
Trans_AmGuy's Avatar
On The Tree
 
Joined: Apr 2003
Posts: 174
Likes: 0
From:
Default

Hey Tony, the quickest and easiest way to install these is both sides from the bottom.... either grind the useless block tap or diconnect your steering linkage on the drivers side and on the passenger side, take off the 4 bolts to the motor mount and jack up the engine until you have enough clearance. One they are in, let motor down and bolt everything up. A good time estimate would be 4 to 6 hours to get it all finished start to finish.
Reply




All times are GMT -5. The time now is 11:57 PM.

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