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

mac headers

Thread Tools
 
Search this Thread
 
Old Sep 6, 2004 | 07:53 PM
  #1  
blackformula69's Avatar
Thread Starter
Teching In
 
Joined: Sep 2004
Posts: 1
Likes: 0
Default mac headers

are these good headers? any real difference in hp gains between these mids and long tubes? any problems fitting? is the catted y pipe good? thank u
Reply
Old Sep 6, 2004 | 07:56 PM
  #2  
Tally TransAm's Avatar
TECH Junkie
20 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (17)
 
Joined: Nov 2001
Posts: 3,406
Likes: 2
From: Tallahassee, Fl
Default

macs are great, ive been running mine for a while now (about 3 years) with no problems or rust. the collector could use some work, i changed mine to a 3" three bolt style, and the primaries could be ported a bit but for bolt on apps they will perform fine.

lt's will make a little more low end grunt but imo the difference is negligable.

also get the ory or have a catted y pipe custom built, mac cats flow horribly
Reply
Old Sep 6, 2004 | 08:57 PM
  #3  
Ferocity02's Avatar
TECH Senior Member
iTrader: (60)
 
Joined: Apr 2003
Posts: 9,397
Likes: 4
Default

Since you are a "newbie", I wont be hard on you, but use the SEARCH button next time.

Here is a recent thread that might help a little:https://ls1tech.com/forums/generation-iii-external-engine/211078-mac-headers.html
Reply
Old Sep 6, 2004 | 09:01 PM
  #4  
Gloveperson's Avatar
TECH Fanatic
iTrader: (9)
 
Joined: Feb 2004
Posts: 1,714
Likes: 0
Default

I honeslty think JRP has an army working for him.

Cliffnotes for that thread:

Macs are great headers, flow great, a little less than LT's, more with more mods, their cats flow like crap, good price.

-Todd
Reply
Old Sep 7, 2004 | 12:49 AM
  #5  
jrp's Avatar
jrp
SN95 Director
20 Year Member
iTrader: (16)
 
Joined: Jul 2003
Posts: 10,755
Likes: 7
From: Valencia, Ca
Default

Originally Posted by Gloveperson
I honeslty think JRP has an army working for him.

Cliffnotes for that thread:

Macs are great headers, flow great, a little less than LT's, more with more mods, their cats flow like crap, good price.

-Todd
LMMFAO
Reply
Old Sep 7, 2004 | 01:47 AM
  #6  
16nrollininaws6's Avatar
TECH Resident
 
Joined: Dec 2003
Posts: 981
Likes: 0
From: Land of rocks and boredom
Default

Search
Reply




All times are GMT -5. The time now is 07:22 PM.

story-0
10 Reasons Daily Driving a Swap Project SUCKS! (& 1 Reason to Do It Anyway)

Slideshow: 10 reasons daily-driving a swap project might not be for you. Or is it?

By Michael S. Palmer | 2026-06-17 09:39:05


VIEW MORE
story-1
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 | 2026-06-09 14:55:56


VIEW MORE
story-2
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 | 2026-06-18 10:26:23


VIEW MORE
story-3
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-4
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-5
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-6
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-7
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-8
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-9
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