Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com
 
TireRack
Go Back   Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com > Engine | Drivetrain | Powertrain Technical Discussions > Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons


Reply
 
Thread Tools
Old 07-12-2021, 08:06 PM   #1
Redrockit
 
Redrockit's Avatar
 
Drives: 2014 2SS/RS MT
Join Date: Jun 2021
Location: CT
Posts: 33
Long tube headers and emissions

I have to ask, since this seems to be the most popular bolt on for hp gain. How are you guys passing emissions in your state? I know the rules vary by state, I live in CT where it is pretty strict.
Redrockit is offline   Reply With Quote
Old 07-12-2021, 08:58 PM   #2
TheFlyingBananaSS
Evil Genius of Chevrolet
 
TheFlyingBananaSS's Avatar
 
Drives: 2017 Z06, 2017 Colorado, 2013 2SS
Join Date: Feb 2017
Location: New York
Posts: 3,127
The tune afterwards does it.
__________________
GPI SS2 VVT cam, ECS Novi 1500 supercharger, Corsa Extreme, Detroit Speed and BMR suspension, Circle D triple disc, Melling oil pump, LS2 chain tensioner, ATI 10% UD, DSX E85 kit, High Energy coils, BTR springs, LS2 Lifter trays, Titanium retainers, hardened push rods, FIC 1000 injectors, ZL1 pump, Mighty Mouse catch can, AEM gauges, Tial BOV, Richmond 3.91 gears, Custom gauge bezels, Speed Engineering headers, Stainless Works HF cats, DSX Aux pump, 710rwhp on E85.
TheFlyingBananaSS is offline   Reply With Quote
Old 07-13-2021, 03:40 AM   #3
morepowerjoe

 
morepowerjoe's Avatar
 
Drives: 2012 Chevrolet Camaro l99
Join Date: Aug 2020
Location: Austin, TX
Posts: 973
After you install the headers you leave out the rear o2 sensors and like Flyingbananass said you get the check engine light turned off with a tune.
__________________
GPI SS1 Camshaft with vvt, GM Performance racing lifters, CHE trunnion upgrade, TSP Chrome Molly pushrods, Pac Polished .660 valve springs, Melling 10355HV oil pump, Cold Air Inductions cai, TSP 1 7/8" longtubes with 3" exhaust, true cool 40k tranny cooler, ebc brakes
morepowerjoe is offline   Reply With Quote
Old 07-13-2021, 06:51 AM   #4
Rainbow1616

 
Rainbow1616's Avatar
 
Drives: 2011 Inferno Orange Camaro 2SS/RS
Join Date: Nov 2011
Location: Pittsburgh, PA
Posts: 1,354
No issues in PA
Rainbow1616 is offline   Reply With Quote
Old 07-13-2021, 08:10 AM   #5
102SS
waiting at the tree
 
102SS's Avatar
 
Drives: SIM 2010 2SS/RS A6
Join Date: Apr 2013
Location: Niagara Falls
Posts: 2,269
Its not a problem if you have a good tuner and your jurisdiction only does OBD2 port testing.

If you need to have a visual inspection you will fail.

If you get pulled over(MTO in Ontario) you will get fined and get a fix it order.
__________________
2010 2SS/RS A6 ZL1 Rims
60ft 2.03 13.08 at 107.82 (4/28)
2009 Pontiac G8 3.6L the DD
102SS is offline   Reply With Quote
Old 07-13-2021, 08:44 AM   #6
pyroguy
Started#gottalovethatblue
 
pyroguy's Avatar
 
Drives: ABM #831
Join Date: Apr 2013
Location: TN
Posts: 6,276
I passed in Pennsylvania and in St. Louis area in Missouri where they were pretty strict. I have high flow cats and had my car tuned. The only comment I ever got was a compliment on the ceramic coating on my headers. I started sweating bullets when I went in for my first emissions check after my cam swap, but I passed with flying colors.
__________________
'10 Camaro 2SS/RS | Aqua Blue #831 of 3,903 | Silver Stripes
Check out my build thread
pyroguy is offline   Reply With Quote
Old 07-13-2021, 10:41 AM   #7
steve7251
 
Drives: 2010 camaro
Join Date: Dec 2013
Location: lakeland,fl
Posts: 28
It depends on your exhaust system with the GM performance exhaust the the headers connected to the cats no turning off or removing of the o2 sensors.
steve7251 is offline   Reply With Quote
Old 07-13-2021, 11:36 AM   #8
SSFury
My Road Rage is Legendary
 
SSFury's Avatar
 
Drives: 2011 IOM 2SS/RS
Join Date: Nov 2010
Location: Sahuarita AZ
Posts: 659
If your worried, get Hi-Flow Cats. I enjoy sleeping at night and not stressing over the car.
__________________
Every Time You Buckle Up In That Car, Tonight Might Be The Night That You Die.
SSFury is offline   Reply With Quote
Old 07-13-2021, 11:52 AM   #9
morepowerjoe

 
morepowerjoe's Avatar
 
Drives: 2012 Chevrolet Camaro l99
Join Date: Aug 2020
Location: Austin, TX
Posts: 973
Quote:
Originally Posted by SSFury View Post
If your worried, get Hi-Flow Cats. I enjoy sleeping at night and not stressing over the car.
I agree. That's why I got cats with my TSP exhaust system because I didn't want to worry about it.
__________________
GPI SS1 Camshaft with vvt, GM Performance racing lifters, CHE trunnion upgrade, TSP Chrome Molly pushrods, Pac Polished .660 valve springs, Melling 10355HV oil pump, Cold Air Inductions cai, TSP 1 7/8" longtubes with 3" exhaust, true cool 40k tranny cooler, ebc brakes
morepowerjoe is offline   Reply With Quote
Old 07-13-2021, 01:57 PM   #10
Bigdumogre

 
Bigdumogre's Avatar
 
Drives: 2012 Camaro SS
Join Date: Dec 2019
Location: New York
Posts: 1,269
Quote:
Originally Posted by morepowerjoe View Post
I agree. That's why I got cats with my TSP exhaust system because I didn't want to worry about it.
Same here
Plus less fumes when sitting in traffic
__________________
2012 Camaro 2SS/RS - CSP Custom Cam 232/240 .615/.615 113 +3, Texas speed CNC heads, FTI billet triple disc converter, K&N cai, Katech ported TB, GPI Ported/rod modded manifold, Texas speed 1 7/8 headers, HFC, Flowmaster 2 chambers with x pipe, Mishimoto CC, MSD wires, Roto fab washer relocation, tru cool 40k trans cooler, apex scoop, Pedders extreme coil overs and much more!!
Bigdumogre is offline   Reply With Quote
Old 07-13-2021, 01:58 PM   #11
GodWentPunk

 
GodWentPunk's Avatar
 
Drives: 2015 2SS White Convertible CE/INDY
Join Date: Mar 2016
Location: Lockport, IL
Posts: 777
I got mine rear O2s tuned out... fine here in Illinois.


joe...
__________________
ARH LTH/HFC/Legato muffler, RDP Custom Tune, K&N Blackhawk CAI, Bigworm Blackout kit, ZL1 Rims, Phantom Grills, VMAX PTB
GodWentPunk is offline   Reply With Quote
Old 05-09-2022, 01:17 PM   #12
Quick Red Head
 
Quick Red Head's Avatar
 
Drives: 2014 2SS 1LE
Join Date: Aug 2020
Location: Northern IL
Posts: 28
You guys that went high flow cats to not have to worry about it, does that mean you have O2 sensors still and they are not just tuned out?

I would like to go the same path and not have to worry, but actually have it meet and not just ignore the O2 sensors (understand a tune would still be required). Not sure it is possible with the LT's and high flow cats. Trying to look on the forums here, but haven't found anyone explicitly saying this.

Also, if it is possible, is the power gains still worth it? Or does it drag it down a bunch, restricting things?
__________________
2014 2SS / RS / 1LE | AGM | M6
Quick Red Head is offline   Reply With Quote
Old 05-09-2022, 01:22 PM   #13
NOT A 45
 
NOT A 45's Avatar
 
Drives: 13 CAMARO 2SS LS3-04 SILVERADO LS3
Join Date: Dec 2021
Location: SOUTHERN MARYLAND
Posts: 385
I have long tubes, and high flo cats. Both rear o2's connected and operating. No tune. Been through emission inspection twice without a problem.
NOT A 45 is offline   Reply With Quote
Old 05-09-2022, 01:57 PM   #14
Arogg
A legend in his own mind
 
Arogg's Avatar
 
Drives: 2010 2SS/RS M6
Join Date: May 2013
Location: Long Island, New York
Posts: 527
Im in Long Island NY. Im running TSP LTS, no cats and Borla Atak. I pass every year. The tune keeps the CEL off. They dont do visual here but even if they did, the TSP catless connections look like Hi-Flo cats
__________________
2010 2SS/RS "The Mistress"

Color matched OEM GFX / VIS Carbon Fiber Hood / 5% Windows / Tinted Exterior Lights / Streetfighter LA Spoiler / Window Louvers everyone Hates / Morimoto XB LED fogs / Airaid CAI / Hurst Short Throw / TSP LT's / No cats / No resonator / Borla Atak axle back / Trifecta Tune / Factory amp replaced / 2 JL Audio 12's in the trunk / MRR 228 Wheels / BMR Springs / Moog Endlinks / R1 Concepts Rotors & Pads
Arogg is offline   Reply With Quote
 
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 06:05 AM.


Powered by vBulletin® Version 3.8.9 Beta 4
Copyright ©2000 - 2022, vBulletin Solutions, Inc.