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

Dual Cutouts in y pipe? Thoughts?

Thread Tools
 
Search this Thread
 
Old Feb 14, 2014 | 04:03 PM
  #1  
73CamaroLT's Avatar
Thread Starter
TECH Apprentice
10 Year Member
Photogenic
iTrader: (8)
 
Joined: Jan 2012
Posts: 358
Likes: 2
From: Hanover, Pa
Default Dual Cutouts in y pipe? Thoughts?

So i recently put on a SLP dual dual from a Loudmouth 2 and i am defnitely missing the sound. Dual dual sounds great at WOT but crusing around is pretty quiet. I have the chance to buy 2 2.5 inch cutouts which would fit into my y pipe as i have BBK which is 2.5. My question is:

How will it sound?
Is there a good place to mount them so i wont loose alot of clearance?
Is it worth it over doing just a single cutout in the I pipe?

Thanks, Brandon
Reply
Old Feb 14, 2014 | 04:26 PM
  #2  
thunderstruck507's Avatar
11 Second Club
iTrader: (18)
 
Joined: Mar 2008
Posts: 8,358
Likes: 27
From: Northwest AR
Default

It will sound like crap, add weight, and be a pain in the ****.

That said, I have dual exhaust with dual cutouts and the car is a little faster with them open. But it is ungodly loud and sounds like garbage so using them anywhere but the track is pointless.
Reply
Old Feb 15, 2014 | 05:33 AM
  #3  
Slowbird780's Avatar
12 Second Club
10 Year Member
iTrader: (6)
 
Joined: Jun 2012
Posts: 208
Likes: 2
From: michigan
Default

If u had a cam it would sound good but without a cam I would not do it. You will hate how horrible it sounds.
Reply
Old Feb 15, 2014 | 02:12 PM
  #4  
z28SSilvest's Avatar
11 Second Club
 
Joined: Aug 2012
Posts: 730
Likes: 0
From: Middletown, DE
Default

I have the single cutout in the I pipe. I've heard the dual cutouts in the Y pipe and like said above it sounds cheap and bad unless you have a cam where it's just really loud, hence the whole point of cutouts
Reply
Old Feb 15, 2014 | 04:18 PM
  #5  
73CamaroLT's Avatar
Thread Starter
TECH Apprentice
10 Year Member
Photogenic
iTrader: (8)
 
Joined: Jan 2012
Posts: 358
Likes: 2
From: Hanover, Pa
Default

Alright guys thanks for the advice. Im just gonna get a single cutout in the I as most people do. Thanks again.
Reply
Old Feb 15, 2014 | 09:33 PM
  #6  
99Bluz28's Avatar
TECH Senior Member
iTrader: (35)
 
Joined: Nov 2007
Posts: 9,705
Likes: 12
From: C. V., Kalifornia
Default

It would also screw up your A/F ratio since the O2s would be to close to the exhaust exits.
Reply
Old Feb 17, 2014 | 06:53 AM
  #7  
moeZ28's Avatar
TECH Fanatic
20 Year Member
iTrader: (7)
 
Joined: Dec 2003
Posts: 1,029
Likes: 2
From: ashland, ky
Default

My 1998 z28 had dual cutouts on it...it was a 347ci h/c/I setup with nitrous. TREX V2 cam...car picked up 21 rwhp on back to back n/a pulls over a magnaflow catback with no change in tune. Others wont see that type of gain though b/c their setup may not be as restricted as mine was. If youre wanting to run electric openers, right after tge headers is a bad idea...trust me. I couldnt keep them working for very long due to the heat and how little room thrre is for them in that location. They will take a beating.
Reply
Old Feb 17, 2014 | 08:56 AM
  #8  
thunderstruck507's Avatar
11 Second Club
iTrader: (18)
 
Joined: Mar 2008
Posts: 8,358
Likes: 27
From: Northwest AR
Default

I was at the track again yesterday and did several runs open then several closed.

Cutouts are worth between .6 and 1 mph on my car over 3" duals with no crossover.
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 17, 2014 | 11:24 AM
  #9  
Quick Time's Avatar
Banned
iTrader: (1)
 
Joined: Nov 2001
Posts: 1,212
Likes: 1
From: New Jersey
Default

If you wish to run dual cutouts on your y pipe please use the low profile oval ones. Standard round ones do not fit properly. Any questions feel free to contact us.
Reply
Old Feb 17, 2014 | 09:16 PM
  #10  
73CamaroLT's Avatar
Thread Starter
TECH Apprentice
10 Year Member
Photogenic
iTrader: (8)
 
Joined: Jan 2012
Posts: 358
Likes: 2
From: Hanover, Pa
Default

Originally Posted by Quick Time
If you wish to run dual cutouts on your y pipe please use the low profile oval ones. Standard round ones do not fit properly. Any questions feel free to contact us.
Thanks guys i decided against the idea. I will most likely be picking up a standard 3inch cutout and stainless steel y pipe from you all in the up coming weeks.
Reply
Old Feb 17, 2014 | 10:43 PM
  #11  
Holloway5's Avatar
On The Tree
 
Joined: Sep 2012
Posts: 125
Likes: 0
Default

^That is what I have and if I had to do it again I would. Being able to control how loud and obnoxious you want to be is pretty fun.
Reply
Old Feb 18, 2014 | 08:31 AM
  #12  
Darkstar632's Avatar
Staging Lane
 
Joined: Mar 2012
Posts: 54
Likes: 0
From: reading, pa
Default

i have dual 3'' electric cutouts just after the end of longtubes...seems expensive but its well worth it just hitting a switch to go from a badass muscle sound to wtf open header bbc sound...if i did it again id get the mopre expensive ones cause any that just "butterfly'' to open/close like a throttle body are going to leak and that sound does get annoying
Reply
Old Feb 18, 2014 | 09:57 AM
  #13  
Blackpanther99's Avatar
TECH Senior Member
iTrader: (8)
 
Joined: Sep 2012
Posts: 6,963
Likes: 4
From: Baytown, TX
Default

It wont sound too good but run ovals as mentioned above. Better clearance.
Reply
Old Mar 4, 2014 | 10:47 PM
  #14  
Midnight02's Avatar
TECH Fanatic
15 Year Member
iTrader: (8)
 
Joined: Feb 2007
Posts: 1,620
Likes: 6
From: Atlanta, GA
Default

I experimented with cutouts off the headers and it sounded terrible. Ended up going with one in the intermediate pipe, added a turn down on the valve to reduce rasp and it just what I was looking for. He's a sound clip.....nothing at idle in this video, but you get the general idea....little rasp or drone:

Reply
Old Mar 5, 2014 | 07:18 AM
  #15  
2000WS6TA's Avatar
12 Second Club
iTrader: (5)
 
Joined: Aug 2005
Posts: 587
Likes: 1
From: finksburg, MD
Default

i had dual cutouts on my x pipe, had a cam so it sounded cool, like a race car almost, but it smelled terrible, had terrible ground clearance and everytime you open them just be ready to drop the $100 for new O2 sensors. so when i fixed an exhaust leak in my X ans swapped it for an H i had them removed, couldnt be happier.
Reply
Old Mar 5, 2014 | 10:30 AM
  #16  
z28SSilvest's Avatar
11 Second Club
 
Joined: Aug 2012
Posts: 730
Likes: 0
From: Middletown, DE
Default

Originally Posted by 2000WS6TA
i had dual cutouts on my x pipe, had a cam so it sounded cool, like a race car almost, but it smelled terrible, had terrible ground clearance and everytime you open them just be ready to drop the $100 for new O2 sensors. so when i fixed an exhaust leak in my X ans swapped it for an H i had them removed, couldnt be happier.
Fix for that: get the O2 sensors tuned out
Reply




All times are GMT -5. The time now is 09:13 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