Long tube headers and emissions - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Redrockit · 07-12-2021, 08:06 PM

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.

TheFlyingBananaSS · 07-12-2021, 08:58 PM

The tune afterwards does it.

morepowerjoe · 07-13-2021, 03:40 AM

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.

Rainbow1616 · 07-13-2021, 06:51 AM

No issues in PA

102SS · 07-13-2021, 08:10 AM

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.

pyroguy · 07-13-2021, 08:44 AM

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.

steve7251 · 07-13-2021, 10:41 AM

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.

SSFury · 07-13-2021, 11:36 AM

If your worried, get Hi-Flow Cats. I enjoy sleeping at night and not stressing over the car.

morepowerjoe · 07-13-2021, 11:52 AM

Quote:

Originally Posted by SSFury

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.

Bigdumogre · 07-13-2021, 01:57 PM

Quote:

Originally Posted by morepowerjoe

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

GodWentPunk · 07-13-2021, 01:58 PM

I got mine rear O2s tuned out... fine here in Illinois.

joe...

Quick Red Head · 05-09-2022, 01:17 PM

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?

NOT A 45 · 05-09-2022, 01:22 PM

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.

Arogg · 05-09-2022, 01:57 PM

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

07-12-2021, 08:06 PM	#1
Redrockit Drives: 2014 2SS/RS MT Join Date: Jun 2021 Location: CT Posts: 42	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.

07-12-2021, 08:58 PM	#2
TheFlyingBananaSS Evil Genius of Chevrolet Drives: 2017 Z06, 2019 XTS, 2013 SS Join Date: Feb 2017 Location: New York Posts: 3,260	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.

07-13-2021, 03:40 AM	#3
morepowerjoe Drives: 2012 Chevrolet Camaro l99 Join Date: Aug 2020 Location: Austin, TX Posts: 2,189	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. __________________ DSS FX Forged Pistons, Eagle ESP L19 Forged Rods, ARP Head and Main Studs, TSP PRC 260 CNC Ported Heads milled .030, Cometic .040 Head Gaskets, GPI SS3 VVT Camshaft, GM Performance Racing Lifters, CHE Trunnions , Molly Pushrods, Melling 10355HV Oil Pump, Cold Air Inductions CAI, Fast LSXR Intake Manifold, Nick Williams 103 TB, TSP 1 7/8" Longtubes with 3" TSP Exhaust, ZL1 Fuel Pump, Mishimoto Radiator, Mishimoto Oil Cooler, Tru Cool 40k Tranny Cooler, 3600 Circle D Converter, Fluid Dynamics Balancer Build Thread https://www.camaro5.com/forums/showthread.php?t=609817

07-13-2021, 08:10 AM	#5
102SS waiting at the tree Drives: SIM 2010 2SS/RS A6 Join Date: Apr 2013 Location: Niagara Falls Posts: 3,400	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 Just a few bolt-ons and appearance doo dads

07-13-2021, 08:44 AM	#6
pyroguy Started#gottalovethatblue Drives: ABM #831 Join Date: Apr 2013 Location: TN Posts: 6,952 View My Garage	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

07-13-2021, 06:51 AM	#4
Rainbow1616 Drives: 2011 Inferno Orange Camaro 2SS/RS Join Date: Nov 2011 Location: Pittsburgh, PA Posts: 1,368	No issues in PA

07-13-2021, 10:41 AM	#7
steve7251 Drives: 2010 camaro Join Date: Dec 2013 Location: lakeland,fl Posts: 30 View My Garage	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.

07-13-2021, 11:36 AM	#8
SSFury My Road Rage is Legendary Drives: 2011 IOM 2SS/RS "Fury" Join Date: Nov 2010 Location: Sahuarita AZ Posts: 735 View My Garage	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.

07-13-2021, 01:58 PM	#11
GodWentPunk Drives: 2015 2SS White Convertible CE/INDY Join Date: Mar 2016 Location: Lockport, IL Posts: 780 View My Garage	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

05-09-2022, 01:17 PM	#12
Quick Red Head Drives: 2014 2SS 1LE Join Date: Aug 2020 Location: Northern IL Posts: 29	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

05-09-2022, 01:22 PM	#13
NOT A 45 Drives: 13 CAMARO 2SS LS3-04 SILVERADO LS3 Join Date: Dec 2021 Location: SOUTHERN MARYLAND Posts: 802	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.

05-09-2022, 01:57 PM	#14
Arogg A legend in his own mind Drives: 2010 2SS/RS M6 Join Date: May 2013 Location: Long Island, New York Posts: 837	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 (absolute trash quality and customer service ) / Heritage Grille / 5% Windows / 30% Windshield tint with 5% visor strip / Tinted Exterior Lights / Streetfighter LA Spoiler / Morimoto XB LED fogs / LED sidemarkers / Airaid CAI / Hurst Short Throw / TSP LT's / No cats / No resonator / Corsa Xtreme Catback / Trifecta Tune / Factory amp replaced / 2 JL Audio 12's / MRR 228 Wheels / BMR Springs / Koni Yellows / R1 Concepts Rotors & Pads