LS4 Performance Grand Prix GXP | Monte Carlo SS | Impala SS | LaCrosse Super

Want to remove the cat.

Thread Tools
 
Search this Thread
 
Old Aug 19, 2010 | 11:16 AM
  #21  
2006GXPgirl.'s Avatar
Thread Starter
Teching In
 
Joined: May 2010
Posts: 23
Likes: 0
From: Ohio
Default

I know the downpipe won't work. I have read that on other threads.

Originally, I wanted the exhaust shop to make me exhaust from the headers to the mufflers with no resonator and no cat, but the guy basically said no what he would normally do is just bolt up my y-pipe back to the headers.

Is reattaching the y-pipe feasible? If it will work, I'm fine with doing that.

Thanks for all the responses. I really appreciate it!
Reply
Old Aug 19, 2010 | 11:29 AM
  #22  
AlabamaGuy's Avatar
TECH Addict
iTrader: (5)
 
Joined: Jun 2009
Posts: 2,802
Likes: 0
Default

If we can compile enough hard evidence for power gained, we could try a sticky.
Reply
Old Aug 19, 2010 | 12:47 PM
  #23  
indynotch50's Avatar
Launching!
 
Joined: Mar 2010
Posts: 265
Likes: 0
From: Morristown, IN
Default

Originally Posted by 2006GXPgirl.
I know the downpipe won't work. I have read that on other threads.

Originally, I wanted the exhaust shop to make me exhaust from the headers to the mufflers with no resonator and no cat, but the guy basically said no what he would normally do is just bolt up my y-pipe back to the headers.

Is reattaching the y-pipe feasible? If it will work, I'm fine with doing that.

Thanks for all the responses. I really appreciate it!
Just find a new shop... I went to 4 before I finally found one that would do it the way I want and i was comfortable with the quality of work. Ask around on local forums or other people in the area that are into hotrods. I found it was out of most shop's comfort zones. Most places don't do "custom" type work, they just fix S10 or cavalier exhaust.
Reply
Old Aug 19, 2010 | 05:48 PM
  #24  
Nick_Nasty's_GXP's Avatar
TECH Enthusiast
15 Year Member
Photogenic
iTrader: (4)
 
Joined: Dec 2009
Posts: 725
Likes: 0
From: Buffalo NY
Default

Originally Posted by Mgpeagle
I have Doug Thorley Headers and I went this route after selling my Hogan catless DP. I welded a 3" ZZP SS flex to the header collector itself then I mated it with a fake cat and welded that to the rest of the cat-back. Worked out great. Here are the links.

http://www.zzperformance.com/grand_p...=671&catid=110

http://www.siliconeintakes.com/produ...4e957b049bdf86

Hope this helps ya and welcome to the club.

-Mike
...Thx again Mike....Still waiting to be put on though. But basically I'm waiting for a tuner. So to the OP, YES, soon after the catless, get a tune.
Reply
Old Aug 19, 2010 | 07:55 PM
  #25  
Mels SS's Avatar
TECH Junkie
iTrader: (1)
 
Joined: Jun 2007
Posts: 3,159
Likes: 0
From: New Orleans La
Default

Originally Posted by AlabamaGuy
If we can compile enough hard evidence for power gained, we could try a sticky.
We should be able to do this and thank you my friend I'm still jealous your going to the fest I will be with you there next year.
Reply




All times are GMT -5. The time now is 04:33 PM.

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 | 2026-06-04 05:00:17


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