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

cutouts behind headers

Thread Tools
 
Search this Thread
 
Old Mar 11, 2011 | 09:02 AM
  #1  
ewssman's Avatar
Thread Starter
Teching In
 
Joined: Oct 2006
Posts: 8
Likes: 0
Default cutouts behind headers

hey guys i got 1999 camaro shafiroff 383 ls1 running thru a factory slp muffler with kooks headers off road pipe putting 2 cutouts wondering what i can expect as a gain with them open
Reply
Old Mar 11, 2011 | 11:42 AM
  #2  
Quick Time's Avatar
Banned
iTrader: (1)
 
Joined: Nov 2001
Posts: 1,212
Likes: 1
From: New Jersey
Default

You can run our Low Profile Oval Cutout on your y pipe. But there is not much of a gain when running 2 vs 1 on the intermediate pipe. The only time the difference would be great is when the Y pipe has a less than favor merge. With a Kooks y pipe you will not have that problem.
If you have any questions feel free to call us.
Reply
Old Mar 11, 2011 | 12:14 PM
  #3  
MNBlade's Avatar
11 Second Club
iTrader: (20)
 
Joined: Mar 2008
Posts: 84
Likes: 0
From: Zimmerman, MN
Default

I have my cut outs right behind the headers. Seemed to me to be the best place for them for racing. Plus it makes it so loud right underneight you. lol
Reply
Old Mar 11, 2011 | 04:24 PM
  #4  
Fabian's Avatar
TECH Enthusiast
15 Year Member
Liked
iTrader: (5)
 
Joined: Aug 2006
Posts: 731
Likes: 10
From: Albuquerque, NM
Default

I've seen dyno results where you actually lose some power with dual cutouts. This was on a heads/big cam setup

Maybe someone else can chime in
Reply
Old Mar 11, 2011 | 05:08 PM
  #5  
conde'strans's Avatar
11 Second Club
iTrader: (8)
 
Joined: Aug 2007
Posts: 804
Likes: 0
From: Baytown, Texas
Default

I saw a 7 hp gain and only have one cutout located after the pipes coming from the longtube headers merge somewhere under the passenger seat.
Reply
Old Mar 11, 2011 | 06:35 PM
  #6  
MAD DOG 20/20's Avatar
Teching In
 
Joined: Jun 2010
Posts: 12
Likes: 0
Default

you loose power on the dyno but you get it back at the track...
Reply
Old Mar 12, 2011 | 12:16 AM
  #7  
ewssman's Avatar
Thread Starter
Teching In
 
Joined: Oct 2006
Posts: 8
Likes: 0
Default

thanks for the feedback ya i cant see it losing power we will see
Reply




All times are GMT -5. The time now is 08:31 AM.

story-0
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-1
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 | 2026-05-28 11:05:11


VIEW MORE
story-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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