LS1TECH - Camaro and Firebird Forum Discussion

Generation III External Engine LS1 | LS6 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:
View Poll Results: What size cutout?
2.5"
0
0%
3"
9
81.82%
3.5"
1
9.09%
4"
1
9.09%
Voters: 11. You may not vote on this poll

cutout question?

Thread Tools
 
Search this Thread
 
Old Jul 24, 2008 | 11:19 PM
Share
  #1  
jrob56's Avatar
jrob56
Thread Starter
TECH Addict
iTrader: (39)
 
Joined: Jul 2006
Posts: 2,153
Likes: 0
From: Indianapolis, IN
Default cutout question?
Here is the situation, a buddy and I are both doing lt's, tsp ory, manual cutout, and the stock z28 rectangle tip catback. I said just get 3 inch because the y is 3" and I think the i-pipe on the stock catback is close to 3 or a little under I think I have been told. Im not totally sure though and neither is he...so whats the right size I know there are a lot of people running this or a very similar setup? So lets here it what do you guys have?
Reply
0
Old Jul 25, 2008 | 08:23 AM
Share
  #2  
zracer323's Avatar
zracer323
12 Second Club
iTrader: (12)
 
Joined: Oct 2007
Posts: 1,340
Likes: 1
From: Dayton, Ohio
Default
Stock I-pipe is 2.75". You need a 3" cutout, it will work with that setup.
Reply
0
Old Jul 25, 2008 | 01:20 PM
Share
  #3  
MikeG's Avatar
MikeG
11 Second Club
iTrader: (33)
 
Joined: Mar 2004
Posts: 1,672
Likes: 0
From: Tampa, FL
Default
I had LTs, ORY and a cutout on my stock Z28 catback on my old car. It was a great setup. Quiet as hell capped and mean as hell open. 3" BTW.
Reply
0
Old Jul 25, 2008 | 01:23 PM
Share
  #4  
WKMCD's Avatar
WKMCD
TECH Junkie
iTrader: (2)
 
Joined: Mar 2005
Posts: 3,416
Likes: 2
From: Northern VA
Default
DMH cutout and match it to the pipe you're going to weld it to.

My $.02
Reply
0
Old Jul 25, 2008 | 03:07 PM
Share
  #5  
jrob56's Avatar
jrob56
Thread Starter
TECH Addict
iTrader: (39)
 
Joined: Jul 2006
Posts: 2,153
Likes: 0
From: Indianapolis, IN
Default
Originally Posted by MikeG
I had LTs, ORY and a cutout on my stock Z28 catback on my old car. It was a great setup. Quiet as hell capped and mean as hell open. 3" BTW.
Thats good to hear, and i was pretty sure its 3, but just wanted to check, thanks a lot guys!

Originally Posted by WKMCD
DMH cutout and match it to the pipe you're going to weld it to.

My $.02
Im just getting the race ready manual cutout now, but after I scratch up some more money Ill be getting the DMH electric valve for it.
Reply
0
Old Jul 25, 2008 | 03:22 PM
Share
  #6  
98_Formula's Avatar
98_Formula
TECH Fanatic
iTrader: (15)
 
Joined: Apr 2005
Posts: 1,058
Likes: 0
From: West Seneca, NY
Default
i had that setup, the stock exhaust was too quiet for me, i always had the cutout open, so i changed up setups to soemthing a little louder, but a 3inch cutout will work perfect
Reply
0
Old Jul 25, 2008 | 03:45 PM
Share
  #7  
jrob56's Avatar
jrob56
Thread Starter
TECH Addict
iTrader: (39)
 
Joined: Jul 2006
Posts: 2,153
Likes: 0
From: Indianapolis, IN
Default
i have a feeling it will be too quiet for me too and the manual will stay open, but on campus there a lot of cops and i dont need any more attention, thats why i want that e-cutout. after i sell my cats i think i am gonna order the DMH and ill have it in time for the start of school...
Reply
0

Trending Topics

Old Jul 25, 2008 | 10:09 PM
Share
  #8  
schronk's Avatar
schronk
On The Tree
iTrader: (4)
 
Joined: Mar 2008
Posts: 142
Likes: 0
From: Burleson
Default
Long tubes and ORY with the cutout open it will sound like death coming down the street!!!!
Reply
0
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

10 Reasons Daily Driving a Swap Project SUCKS! (& 1 Reason to Do It Anyway)

 Michael S. Palmer
story-1

6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

 Brett Foote
story-2

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-3

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-4

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-5

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-6

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-7

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

 Verdad Gallardo
story-8

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-9

Top 10 Most Powerful Chevy Trucks Ever Made!

 
Old Jul 26, 2008 | 12:14 AM
Share
  #9  
Slvr00Bird's Avatar
Slvr00Bird
TECH Fanatic
iTrader: (2)
 
Joined: Jan 2007
Posts: 1,419
Likes: 0
From: Ashland & Lexington, KY
Default
Originally Posted by jrob56
Thats good to hear, and i was pretty sure its 3, but just wanted to check, thanks a lot guys!



Im just getting the race ready manual cutout now, but after I scratch up some more money Ill be getting the DMH electric valve for it.
I've got the Raceready Electric cutout and love it..
3" BTW..
Reply
0
Back to Subforum
Generation III External Engine
View Next Unread
Is this Deal from Texas Speed any good?




Advanced Search

All times are GMT -5. The time now is 01:48 PM.

story-0
10 Reasons Daily Driving a Swap Project SUCKS! (& 1 Reason to Do It Anyway)

Slideshow: 10 reasons daily-driving a swap project might not be for you. Or is it?

By Michael S. Palmer | 2026-06-17 09:39:05


VIEW MORE
story-1
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-09 14:55:56


VIEW MORE
story-2
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-06-18 10:26:23


VIEW MORE
story-3
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-4
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-5
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-6
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-7
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-8
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-9
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