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

Best y pipe???

Thread Tools
 
Search this Thread
 
Old Sep 29, 2015 | 07:22 PM
  #1  
gsxkid's Avatar
Thread Starter
On The Tree
iTrader: (2)
 
Joined: Apr 2005
Posts: 153
Likes: 0
Default Best y pipe???

I'm having a hard time searching from my phone but I've seen some people mention cutting out the y and welding in a better y. I just ordered a set of speed engineering 1 7/8 and im in need of a y pipe. Should I just order a speed engineering y pipe? Or is there a better flowing y pipe available? Or should I get the cheapest y pipe available and weld my own y in and if so what y do I get to weld in?
Reply
Old Sep 29, 2015 | 07:46 PM
  #2  
ragtopz28's Avatar
TECH Addict
iTrader: (57)
 
Joined: Aug 2007
Posts: 2,014
Likes: 11
From: Ft. Myers, FL
Default

Get the SE Y-pipe with your header order. Cut off the reducer and the merge exit is now greater than 3"....that's what I did and have little to no rasp.

Last edited by ragtopz28; Sep 29, 2015 at 07:58 PM.
Reply
Old Sep 29, 2015 | 07:49 PM
  #3  
Jay-P's Avatar
TECH Regular
iTrader: (16)
 
Joined: Jun 2006
Posts: 466
Likes: 1
From: Wpg, Mb Canada
Default

Speed engineering makes a decent looking y-pipe but as ^^ said it requires a bit of work.

You could get that, or buy yourself a flowmaster merge from summit and get a local muffler shop to use it to connect your headers to the rest of your exhaust.
Reply
Old Sep 29, 2015 | 07:51 PM
  #4  
gsxkid's Avatar
Thread Starter
On The Tree
iTrader: (2)
 
Joined: Apr 2005
Posts: 153
Likes: 0
Default

Originally Posted by ragtopz28
Get the SE Y-pipe with your header order. Cut off the reducer and the merge exit is now greater than 3"....that's what I did and have little to no rasp.
Not a bad plan. Maybe I could add a 3.5" cutout there .
Reply
Old Sep 29, 2015 | 08:13 PM
  #5  
high n dry's Avatar
Banned
iTrader: (18)
 
Joined: Mar 2013
Posts: 431
Likes: 1
Default

Y dick around with all that... buy a kooks y pipe in be headaches ahead!
Reply
Old Sep 29, 2015 | 09:00 PM
  #6  
gsxkid's Avatar
Thread Starter
On The Tree
iTrader: (2)
 
Joined: Apr 2005
Posts: 153
Likes: 0
Default

Originally Posted by high n dry
Y dick around with all that... buy a kooks y pipe in be headaches ahead!
What makes the kooks better?
Reply
Old Sep 30, 2015 | 10:20 AM
  #7  
CoolAid's Avatar
11 Second Club
 
Joined: Dec 2008
Posts: 322
Likes: 1
Default

Drive it on headers to an exhaust shop and have them do true dual over axle.

The best Y is no Y.

I'm going Friday to have my SE Y converted to dual 2.5" over axle into bullets.

Regardless of the flow properties of a large setup Y, a 2 to 1 to 2 exhaust setup like a 4cyl every-mobile on a muscle car makes hotrod Jesus cry.
Reply
Old Sep 30, 2015 | 10:53 AM
  #8  
MYSTIC-1SC's Avatar
TECH Junkie
iTrader: (14)
 
Joined: Sep 2007
Posts: 3,277
Likes: 14
Default

If you are trying to stay low cost I recommend sticking with the Speed Engineering Y-pipe. While it may not be as efficient as a true dual setup, its a decent part for the price.
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 Sep 30, 2015 | 11:21 AM
  #9  
gsxkid's Avatar
Thread Starter
On The Tree
iTrader: (2)
 
Joined: Apr 2005
Posts: 153
Likes: 0
Default

Originally Posted by CoolAid
Drive it on headers to an exhaust shop and have them do true dual over axle.

The best Y is no Y.

I'm going Friday to have my SE Y converted to dual 2.5" over axle into bullets.

Regardless of the flow properties of a large setup Y, a 2 to 1 to 2 exhaust setup like a 4cyl every-mobile on a muscle car makes hotrod Jesus cry.
I understand true duals are best for hp. But I don't want the headache of clearance and I also want the 2 tips out the back .
Reply
Old Sep 30, 2015 | 01:21 PM
  #10  
ragtopz28's Avatar
TECH Addict
iTrader: (57)
 
Joined: Aug 2007
Posts: 2,014
Likes: 11
From: Ft. Myers, FL
Default

Originally Posted by gsxkid
I understand true duals are best for hp. But I don't want the headache of clearance and I also want the 2 tips out the back .
I agree and that is how I am set up. A well setup 3" Y with cutout isn't that restrictive + you can have the stock(ish) db level for everyday driving. My cut out open was worth 10hp over my hooker aerochamber muffler w/stock tips.
Reply
Old Sep 30, 2015 | 02:00 PM
  #11  
blk00ss's Avatar
TECH Addict
iTrader: (66)
 
Joined: Feb 2007
Posts: 2,366
Likes: 5
From: Jasper, AL
Default

Originally Posted by CoolAid
Drive it on headers to an exhaust shop and have them do true dual over axle.

The best Y is no Y.

I'm going Friday to have my SE Y converted to dual 2.5" over axle into bullets.

Regardless of the flow properties of a large setup Y, a 2 to 1 to 2 exhaust setup like a 4cyl every-mobile on a muscle car makes hotrod Jesus cry.
Lol @ 2.5" exhaust. Cute.
Reply
Old Sep 30, 2015 | 02:06 PM
  #12  
CoolAid's Avatar
11 Second Club
 
Joined: Dec 2008
Posts: 322
Likes: 1
Default

Originally Posted by CoolAid
Regardless of the flow properties
You guys miss this part? I never said dual was best for HP or that dual was superior in flow.

Sorry I made fun of everybody's minivan exhaust design on steroids.
Reply
Old Sep 30, 2015 | 05:36 PM
  #13  
gsxkid's Avatar
Thread Starter
On The Tree
iTrader: (2)
 
Joined: Apr 2005
Posts: 153
Likes: 0
Default

Originally Posted by CoolAid
You guys miss this part? I never said dual was best for HP or that dual was superior in flow.

Sorry I made fun of everybody's minivan exhaust design on steroids.
I'm not trying to make any arguments here. I'm also not looking to run true duals. I'm just looking for the best option for a y pipe.

Right now I'm leaning towards the s.e and cutting the smaller end off and adding a 3.5" cutout. That may not be true duals but shouldn't lose to much power to true duals.
Reply
Old Sep 30, 2015 | 06:16 PM
  #14  
CoolAid's Avatar
11 Second Club
 
Joined: Dec 2008
Posts: 322
Likes: 1
Default

Whichever Y, make sure you add a blend merge in. I just drove home with that horrible resonance and it sounds so bad in the car. Windows down sounds great but with them up you are subject to both headers smashing their flows together right under your console. All the SE stuff is good stuff for fitment and metal quality, it just desperately needs a channeled merge at the Y for it not to sound hillbilly status.
Reply
Old Sep 30, 2015 | 06:18 PM
  #15  
brobinson216's Avatar
TECH Apprentice
iTrader: (11)
 
Joined: Aug 2015
Posts: 388
Likes: 1
From: Charlotte NC
Default

If money is not an option, yet quality not sacrificed there are three choices.

1. Kooks, or American Racing
2. Buy 4 30" pieces of stainless and your own Y pipe with a FM, Magnaflow and have an exhaust fab it up for you.

If you are looking to come out cheap buy the SE. But I must warn you with a resonater only style muffler be prepared for an unwanted rasp or high pitch ping noise.

If you want to tone that rasp down, buy a magnaflow Y and have it welded in place of the SE merge.
Reply
Old Sep 30, 2015 | 06:36 PM
  #16  
ragtopz28's Avatar
TECH Addict
iTrader: (57)
 
Joined: Aug 2007
Posts: 2,014
Likes: 11
From: Ft. Myers, FL
Default

I also don't want to argue....opinions/perceptions vary. I will say this, I've owned crappy merges (to remain nameless). My old y-set up I welded in a FM merge and it took away ~80% of the rasp (huge improvement). I was very impressed with the lack of rasp after I modified the SE merge-to cutout to muffler. Some will say any open exhaust will sound like a clapped out farm truck. I say the modded SE is the best sound so far. IMHO
Reply
Old Sep 30, 2015 | 08:45 PM
  #17  
gsxkid's Avatar
Thread Starter
On The Tree
iTrader: (2)
 
Joined: Apr 2005
Posts: 153
Likes: 0
Default

Do the weld up merges help with HP and rasp or mostly for the rasp?
Reply
Old Sep 30, 2015 | 08:57 PM
  #18  
CoolAid's Avatar
11 Second Club
 
Joined: Dec 2008
Posts: 322
Likes: 1
Default

You can probably see slight HP increases with proper merges. Exhaust velocity is increased without the two sides slamming into each other and creating turbulence. Same theory and reason people want merge spikes in the collectors of their headers. It's an every little bit helps type thing though, not a major HP mod difference.
Reply




All times are GMT -5. The time now is 05:23 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