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

flowmaster merge question

Thread Tools
 
Search this Thread
 
Old Oct 30, 2009 | 12:23 PM
  #1  
therobman's Avatar
Thread Starter
TECH Fanatic
iTrader: (39)
 
Joined: Oct 2006
Posts: 1,766
Likes: 2
From: Nyc
Default flowmaster merge question

im about to order one from summit i dont really know what size to get i have a 3" pacesetter y and a 3" catback also will i need any other couplers or anything to make it fit or can i simply cut it out and weld it in???
thanks
Reply
Old Oct 30, 2009 | 02:32 PM
  #2  
therobman's Avatar
Thread Starter
TECH Fanatic
iTrader: (39)
 
Joined: Oct 2006
Posts: 1,766
Likes: 2
From: Nyc
Default

?????????????????
Reply
Old Oct 30, 2009 | 02:37 PM
  #3  
tim99ws6's Avatar
9 Second Club
iTrader: (31)
 
Joined: Oct 2002
Posts: 3,175
Likes: 2
From: Nashville, TN
Default

Depends on what your Y-merge looks like right now, but I think the one i put one on did require a extra 90* elbow. It's been a few years though, so bear with me!
Reply
Old Oct 30, 2009 | 03:56 PM
  #4  
therobman's Avatar
Thread Starter
TECH Fanatic
iTrader: (39)
 
Joined: Oct 2006
Posts: 1,766
Likes: 2
From: Nyc
Default

thanks anybody else have some insite
Reply
Old Oct 31, 2009 | 12:53 PM
  #5  
therobman's Avatar
Thread Starter
TECH Fanatic
iTrader: (39)
 
Joined: Oct 2006
Posts: 1,766
Likes: 2
From: Nyc
Default

????????????????
Reply
Old Oct 31, 2009 | 01:44 PM
  #6  
Damian's Avatar
LSX Mechanic
20 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (89)
 
Joined: Nov 2001
Posts: 10,396
Likes: 13
From: Atlanta
Default

This is what it looks like:



And a quick google search...

http://cgi.ebay.com/ebaymotors/Flowm...01810006r18836

You will need the 3" going into a 3.5".
Reply
Old Oct 31, 2009 | 02:43 PM
  #7  
1redta's Avatar
TECH Apprentice
 
Joined: Dec 2004
Posts: 347
Likes: 0
From: fort campbell
Default

I used the 3" in y to 4" merge with a dynomax race magmun and piece of 4" pipe ro the axle. after that I used a 4" to 3" adapter to go back to the 3" catback I had in place. There is a huge thread here that PatG started about this.
Reply
Old Oct 31, 2009 | 02:52 PM
  #8  
LS1ROPER's Avatar
On The Tree
iTrader: (21)
 
Joined: Jul 2005
Posts: 126
Likes: 0
From: Alex. Louisiana
Default

I have 3" y pipe along with 3" I pipe I ordered the 3x3.5 Flowmaster Merger worked with no coupler or anything just make sure you go to a good Exhaust Shop fitment is important not much room as Im sure you know!
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

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

 Verdad Gallardo
story-1

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-2

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-3

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-4

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

 Verdad Gallardo
story-5

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-6

10 Camaros You Should Never Buy

 
story-7

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
story-8

Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0

 Brett Foote
story-9

10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever

 Verdad Gallardo
Old Oct 31, 2009 | 03:05 PM
  #9  
therobman's Avatar
Thread Starter
TECH Fanatic
iTrader: (39)
 
Joined: Oct 2006
Posts: 1,766
Likes: 2
From: Nyc
Default

thanks did you have a pacesetter y?
Reply
Old Nov 1, 2009 | 12:07 AM
  #10  
ScrapinBye's Avatar
Launching!
 
Joined: Apr 2006
Posts: 213
Likes: 0
From: Back to Newport News
Default

I have a pacesetter ORY with the FM merge welded in. I ordred the 3" inlet/3.5" outlet FM merge. The exhaust shop was able to cut and chop and put in a reducer without me suppling anything but the merge itself. Any decent exhaust shop should be able to do this with no problem.
Reply
Old Nov 1, 2009 | 01:08 AM
  #11  
therobman's Avatar
Thread Starter
TECH Fanatic
iTrader: (39)
 
Joined: Oct 2006
Posts: 1,766
Likes: 2
From: Nyc
Default

me and my dad are doing it he has his own shop he knows what hes doing but heres the pacesetter y it looks tight when i cut it off looks like ill need two 45 degree bends

Reply
Old Nov 1, 2009 | 01:13 AM
  #12  
jetlag's Avatar
11 Second Club
iTrader: (32)
 
Joined: Jan 2006
Posts: 3,701
Likes: 2
From: Southaven, MS (near Memphis, TN)
Default

therobman, I also thought two 45* pieces would work...it did not..

Here is my post about using a Pacesetter Ypipe

https://ls1tech.com/forums/12018378-post4.html
Reply
Old Nov 1, 2009 | 02:13 PM
  #13  
therobman's Avatar
Thread Starter
TECH Fanatic
iTrader: (39)
 
Joined: Oct 2006
Posts: 1,766
Likes: 2
From: Nyc
Default

thanks thats what i was looking for looks like it should be fun lol
Reply
Old Nov 1, 2009 | 02:32 PM
  #14  
KurtRardin's Avatar
TECH Addict
Veteran: Marine Corps
20 Year Member
iTrader: (11)
 
Joined: Nov 2005
Posts: 2,148
Likes: 4
From: Gainesville, GA
Default

I've got some more pics of the same setup in my sig. It made a nice difference in the top end. I bet your setup sounds awesome jetlag!
Reply
Old Nov 1, 2009 | 10:28 PM
  #15  
jetlag's Avatar
11 Second Club
iTrader: (32)
 
Joined: Jan 2006
Posts: 3,701
Likes: 2
From: Southaven, MS (near Memphis, TN)
Default

Originally Posted by KurtRardin
I've got some more pics of the same setup in my sig. It made a nice difference in the top end. I bet your setup sounds awesome jetlag!
It definitely helped with the rasp! It is pretty much all gone now and sounds a ton better.

The Pacesetter "merge" is pathetic.
Reply
Old Nov 2, 2009 | 12:01 AM
  #16  
therobman's Avatar
Thread Starter
TECH Fanatic
iTrader: (39)
 
Joined: Oct 2006
Posts: 1,766
Likes: 2
From: Nyc
Default

thats what i plan to kill the rasp
Reply
Old Nov 2, 2009 | 06:59 AM
  #17  
KurtRardin's Avatar
TECH Addict
Veteran: Marine Corps
20 Year Member
iTrader: (11)
 
Joined: Nov 2005
Posts: 2,148
Likes: 4
From: Gainesville, GA
Default

I wouldn't plan on it killing all the rasp unless you dump it like jetlag. Yes the merges that most Y pipes use don't do anything to help it I still feel like its the single 3" pipe going over the axle that rasps it up. My hooker exhaust is a little raspy still. You know, come to think of it, I seem to remember a member here talking about how his 4" mufflex with magnaflow muffler was raspy too.

The merge will help a lot with the rasp. Dumping the exhaust helps to hide it too.
Reply
Old Nov 4, 2009 | 01:47 PM
  #18  
therobman's Avatar
Thread Starter
TECH Fanatic
iTrader: (39)
 
Joined: Oct 2006
Posts: 1,766
Likes: 2
From: Nyc
Default

as long as the merge cuts down the rasp a little i just got it in the mail its a very nice piece now i see why people say the pacesetter merge is terrible hahaha ill post up results after i install it
Reply




All times are GMT -5. The time now is 05:39 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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
story-8
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0

The world was a better place when it was still around.

By Brett Foote | 2026-01-23 09:20:37


VIEW MORE
story-9
10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever

Slideshow: The 7.0-liter LS7 was designed for absolute cutting-edge performance.

By Verdad Gallardo | 2026-01-07 18:36:00


VIEW MORE