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

What size Cut-out

Thread Tools
 
Search this Thread
 
Old Apr 27, 2004 | 12:00 AM
  #1  
Mastronardi's Avatar
Thread Starter
Teching In
 
Joined: Mar 2004
Posts: 48
Likes: 0
From: Fort Lewis, WA 98433
Question What size Cut-out

I want to put a cutout after the y-pipe. does anyone know the size of the pipe that connects from the y-pipe to the muffler. I have a stock exhaust on a 01 camaro ss, and what size cutout do i need.

Mastronardi
Reply
Old Apr 27, 2004 | 12:51 AM
  #2  
OnyxY2KSS's Avatar
TECH Apprentice
 
Joined: Nov 2003
Posts: 309
Likes: 0
From: Houston, Tx
Default

3 inch i believe
Reply
Old Apr 27, 2004 | 02:04 AM
  #3  
Blue2002SS's Avatar
TECH Apprentice
iTrader: (13)
 
Joined: Jul 2003
Posts: 357
Likes: 0
From: Tempe, AZ
Default

I sure hope it is a 3" because that is what I just ordered last night for my 2002 SS
Reply
Old Apr 27, 2004 | 02:19 AM
  #4  
deznuttzz28's Avatar
TECH Enthusiast
 
Joined: Mar 2003
Posts: 653
Likes: 0
From: REDWOOD CITY, CALIFORNIA
Default

i'm pretty sure is 3"
Reply
Old Apr 27, 2004 | 04:01 AM
  #5  
ChevyGoldfinger's Avatar
Launching!
 
Joined: Jan 2003
Posts: 218
Likes: 0
From: NV
Default

Originally Posted by Mastronardi
I want to put a cutout after the y-pipe. does anyone know the size of the pipe that connects from the y-pipe to the muffler. I have a stock exhaust on a 01 camaro ss, and what size cutout do i need.

Mastronardi
The 3" cutout works well, however the I-pipe in the LS1 cars is less than 3" pipe. I recently found out that the stock pipe is more like 2.75 O.D. & whatever that is I.D. At any rate, that was why SLP sold many 3" I-pipes to folks that wanted the 3" all the way back. (other aftermarket catbacks may well have true 3" I-pipes as well)

I tried the QTP electric cutout on my 99 Z28, but the motor fell off onto the road after only 8 months & 3000 miles. I then went with a Keith McCord power plate, and have had great results with his MPP2 electric cutout. It didn't vibrate itself to pieces like the QTEC did. I know QTP is a board sponsor, and some peeps may have had better luck with their cutouts than I did, but the McCord worked better for me as far as durability, plus they're considerabley CHEAPER. . .
Reply
Old Apr 27, 2004 | 04:25 AM
  #6  
dkubricht's Avatar
TECH Apprentice
 
Joined: Mar 2004
Posts: 379
Likes: 0
From: Houston, TX
Default

Just wanted to point this out. On the QTP website, check the QTEC's in action video and watch the WRX one. When its open, the top bolt moves a little from the vibrations. I would put some treadlock on or maybe a lockwasher cause that thing is going to fall off. (like goldfinger for instance)
Reply
Old Apr 27, 2004 | 07:48 AM
  #7  
WILWAXU's Avatar
TECH Senior Member
20 Year Member
iTrader: (6)
 
Joined: Nov 2001
Posts: 14,378
Likes: 1
From: League City, TX
Default

Stock pipe is a little smaller.. but a 3" cutout is what you want.
Reply
Old Apr 27, 2004 | 07:53 AM
  #8  
Durien's Avatar
11 Second Club
 
Joined: Oct 2002
Posts: 1,400
Likes: 0
From: NY,CT & MA
Default

i run a 3" with a QTEC..

and i have never had any probems with my QTEC cutout. i have lots of friends that run them and have not have any problems what so ever. One of my buddies threw out his McCord in the garbage(he got tired of it breaking)and got a QTEC
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 Apr 27, 2004 | 08:22 AM
  #9  
ChevyGoldfinger's Avatar
Launching!
 
Joined: Jan 2003
Posts: 218
Likes: 0
From: NV
Default

Originally Posted by Durien
i run a 3" with a QTEC..

and i have never had any probems with my QTEC cutout. i have lots of friends that run them and have not have any problems what so ever. One of my buddies threw out his McCord in the garbage(he got tired of it breaking)and got a QTEC
I guess everyone has different luck with mechanical things. Funny thing that you have never heard of anyone having any problems with the QTEC cutout, because when I called Barry and told him about his motor falling off onto the road on mine after only 8 months, his reply to me was "Well, that's about all we get out of them, they just vibrate apart after about a year." He never offered to sell me a replacement for a reduced amount, or take care of the problem, other than making the comment, "you could try J.B. Weld on it, but it probably wouldn't hold." Other than that, he just made it clear that they basically all fall apart in around a year.

That was when I went to Keith McCord and he went out of his way to help
me get things working, even had me send what was left of the wiring off of the QTEC after being dragged down the highway for 3 miles, and used that wiring on one of his MPP2 Power Plates, so that I could continue to use the existing switch and the other undamaged wiring from QTP. All this, and he sold me his Power Plate all wired up for my existing setup, for a reduced price.

These are FACTS and not intended to flame a board sponsor, just telling the truth about what my experience was. Barry from QTP may or may not admit to, or even remember saying those things, but I have no reason to lie about what happened. If the admins delete this post, then so be it. . . after all it is hearsay. However, your story about your buddies throwing out the McCord cutout is also hearsay.
Reply
Old Apr 27, 2004 | 09:06 AM
  #10  
Durien's Avatar
11 Second Club
 
Joined: Oct 2002
Posts: 1,400
Likes: 0
From: NY,CT & MA
Default

Originally Posted by ChevyGoldfinger
I guess everyone has different luck with mechanical things. Funny thing that you have never heard of anyone having any problems with the QTEC cutout, because when I called Barry and told him about his motor falling off onto the road on mine after only 8 months, his reply to me was "Well, that's about all we get out of them, they just vibrate apart after about a year." He never offered to sell me a replacement for a reduced amount, or take care of the problem, other than making the comment, "you could try J.B. Weld on it, but it probably wouldn't hold." Other than that, he just made it clear that they basically all fall apart in around a year.

That was when I went to Keith McCord and he went out of his way to help
me get things working, even had me send what was left of the wiring off of the QTEC after being dragged down the highway for 3 miles, and used that wiring on one of his MPP2 Power Plates, so that I could continue to use the existing switch and the other undamaged wiring from QTP. All this, and he sold me his Power Plate all wired up for my existing setup, for a reduced price.

These are FACTS and not intended to flame a board sponsor, just telling the truth about what my experience was. Barry from QTP may or may not admit to, or even remember saying those things, but I have no reason to lie about what happened. If the admins delete this post, then so be it. . . after all it is hearsay. However, your story about your buddies throwing out the McCord cutout is also hearsay.
I really dont know if you are telling the truth or not .... since you are talking so much crap

QTP is a big company that sells a lot of these QTEC Valves.... do you think they would be in bussiness if they werent good? Just look around..just about everyone has a QTEC... i dont understand why the hell you are bashing them.. My experience with them has been great and many of will agree. Most of the Fbody, Mustang and Import guys around my have the QTEC.. and they have no issues.
As far as my friends McCord i saw it break on him and yes It was replaced by them but it kept breaking.. no wonder McCord keeps coming out with new versions

the QTEC unit is by far a better product
Reply
Old Apr 27, 2004 | 11:39 AM
  #11  
ChevyGoldfinger's Avatar
Launching!
 
Joined: Jan 2003
Posts: 218
Likes: 0
From: NV
Default

Originally Posted by Durien
I really dont know if you are telling the truth or not .... since you are talking so much crap

QTP is a big company that sells a lot of these QTEC Valves.... do you think they would be in bussiness if they werent good? Just look around..just about everyone has a QTEC... i dont understand why the hell you are bashing them.. My experience with them has been great and many of will agree. Most of the Fbody, Mustang and Import guys around my have the QTEC.. and they have no issues.
As far as my friends McCord i saw it break on him and yes It was replaced by them but it kept breaking.. no wonder McCord keeps coming out with new versions

the QTEC unit is by far a better product
Well well, you just made my case for me.
You admit that McCord replaces their product if found to be defective, (nobody is perfect, except QTP according to you) and you also admit that McCord keeps coming out with new (read improved) products. I refuse to get into a battle of wits with an unarmed person, so I'll let this drop right here, and this will be my last post on the subject. You go ahead continue to jump on every thread with anything to do with exhaust cutouts with your pom poms and sing the praises of your pal across the river from you. By now you must be getting your stuff free over there. What are you his brother-in-law?

People can judge for themselves, all I wanted to do was save them some hassles by relating my own personal experience.
I'm done, and off >

Last edited by ChevyGoldfinger; Apr 27, 2004 at 11:44 AM.
Reply
Old May 23, 2004 | 07:04 PM
  #12  
Street Pro's Avatar
On The Tree
 
Joined: May 2004
Posts: 134
Likes: 0
From: Birmingham, AL
Default #' Will do the trick

Originally Posted by WILWAXU
Stock pipe is a little smaller.. but a 3" cutout is what you want.
The guys are right --3" is the way to go --the pipes are 2.75" -- many Street Pro 3" Diverters have been put on current F-Body rides --Avg. HP increase is 16HP over stock pipes --The Street Pro has a 1 year full warranty --Check out the web site - lots of good installation photos
Reply




All times are GMT -5. The time now is 08:23 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