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

Mac Ypipe install?

Thread Tools
 
Search this Thread
 
Old May 31, 2005 | 09:56 AM
  #1  
Vertigo's Avatar
Thread Starter
TECH Resident
iTrader: (1)
 
Joined: Apr 2004
Posts: 773
Likes: 0
From: Winchester,VA
Default Mac Ypipe install?

I have stock headers and I am about to install a Mac Y-pipe to elimiate the Cats...BUT when i lined everything up the front of the Y-pipe only made it to the back/bottom of the CAT??

At the TOP of the Cat/ bottom of the headers there is a TRIANGLE mount plate...with 3bolts going from the cat the the headers... How would i make this work? Does anybody make an extension that would replace the CAT with a straight through tube that would mount inbetween the top of the Ypipe to the bottom of the header where the triangle mounting plate is? I'm sorry some pictures would probably help but I know there are some people out there who know exactly what I am taking about....
Reply
Old May 31, 2005 | 10:04 AM
  #2  
AdamSS's Avatar
TECH Enthusiast
20 Year Member
iTrader: (3)
 
Joined: Jan 2002
Posts: 740
Likes: 0
From: Chicago Suburbs
Default

I don't think MAC y-pipe will fit the stock headers.... from what I saw, they kinnda differ in lenght.

I would get SLP Y-pipe. You can get it slightly used for about $100. That will fit stock headers and cats....
Reply
Old May 31, 2005 | 10:09 AM
  #3  
USMARINE1108's Avatar
TECH Regular
15 Year Member
iTrader: (2)
 
Joined: Apr 2005
Posts: 490
Likes: 22
From: Beaufort SC
Default

Ummmmmmmmmmmm just get the headers? Or take it to a good exhaust guy and he should be able to fabricate something. But I think between the time/money/pain to remove it in the future, you're just better off getting headers now. Here's a pic of the Mac's with the Mac ORY if it helps you out...........
Reply
Old May 31, 2005 | 01:09 PM
  #4  
Vertigo's Avatar
Thread Starter
TECH Resident
iTrader: (1)
 
Joined: Apr 2004
Posts: 773
Likes: 0
From: Winchester,VA
Default

there is no way that can be right in your pic..There just isn't enough down angle where the headers meet the Y. In other words How is the Y clearing the floorboard without something coming off the Headers and going down?
Reply
Old May 31, 2005 | 01:16 PM
  #5  
AdamSS's Avatar
TECH Enthusiast
20 Year Member
iTrader: (3)
 
Joined: Jan 2002
Posts: 740
Likes: 0
From: Chicago Suburbs
Default

There is nothing wrong with this picture. Look at the manifolds. They "sit" on the floor at declined angle, hence the merge collectors look like they are pefrectly straight.
If you actualy had the manifolds leveled, you'd have the pipe going downwards...
Reply
Old May 31, 2005 | 01:33 PM
  #6  
Vertigo's Avatar
Thread Starter
TECH Resident
iTrader: (1)
 
Joined: Apr 2004
Posts: 773
Likes: 0
From: Winchester,VA
Default

im sure your right it just doesn't look like there would be enough room...I guess i'll just re-think this whole thing..
Reply
Old May 31, 2005 | 02:21 PM
  #7  
SSBRONCS's Avatar
Launching!
 
Joined: Nov 2004
Posts: 242
Likes: 0
Default

the ypipe is on backwards. the flat plate goes on the passenger side.
There is plenty of room I installed mine about 3 weeks ago. The tips of the y-pipe have a slight angle towards the top where it meets the headers
Reply
Old Jun 2, 2005 | 11:50 PM
  #8  
USMARINE1108's Avatar
TECH Regular
15 Year Member
iTrader: (2)
 
Joined: Apr 2005
Posts: 490
Likes: 22
From: Beaufort SC
Default

Yea, sorry about that.........I just figured you would figure that out. There is no way to line them up sitting on the ground because of the angles. SSBRONCS is right. Don't worry, I installed them correctly on my car! I just set them up like that for the pic when I got them.
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 Jun 3, 2005 | 09:29 PM
  #9  
satinleafct's Avatar
TECH Apprentice
iTrader: (1)
 
Joined: Dec 2004
Posts: 366
Likes: 0
Default

MAC makes two y-pipes, one that fits stock headers, and one that fits there mid-length style header, I think you might have gotten the wrong one.
Reply




All times are GMT -5. The time now is 10:45 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