ARH Headers Question - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Corvin · 08-16-2009, 06:39 PM

Now anyone correct me if I'm wrong but I was under the impression that installing these makes your car have error codes. If this is true has there been any word on a fix for it?

camaro1 · 08-16-2009, 07:09 PM

i have installed several of the long tube header set ups with the small bullet cats and all of them have eventually set the p0420/421 cat efficiency codes, these were not the arh headers but other brands that have the same style small bullet cats

only way to fix it is to have a tune done and turn off the codes

Corvin · 08-16-2009, 07:17 PM

But wouldn't that show up when you have your emissions test done and cause it to fail?

Mr_Draco · 08-16-2009, 07:28 PM

Quote:

Originally Posted by Corvin

But wouldn't that show up when you have your emissions test done and cause it to fail?

Yes. Long tube headers and cats will cause your car to fail the emission test if you live in an area that does it.

camaro1 · 08-16-2009, 07:30 PM

Quote:

Originally Posted by Corvin

But wouldn't that show up when you have your emissions test done and cause it to fail?

yes if the code is current,, from what i have seen these small bullet converters are hit and miss,, sometimes when the ecm runs the cat efficiency test they will pass then sometimes they wont. your ecm is always doing emmision test while you drive, all depending on your driving cycle/ style of driving

sscamaro · 08-17-2009, 09:35 AM

I've put LT headers on my 02 Camaro SS(FLP) and my 05 Corvette(Kooks). I have never thrown a code with either one at anytime. Some will and some won't.

A.R. Headers · 08-17-2009, 02:51 PM

Guys, This is always a popular question. The easiest fix, and consequently what produces the best results, is a tune. This eliminates any possibility of a CEL and at the same time boosts performance throughout the RPM range. Regardless of headers used, tuning is a must.

Nick

Michael_Js · 08-17-2009, 02:53 PM

but even with a tune will it fail emissions testing??

Gentry78 · 08-17-2009, 03:03 PM

Quote:

Originally Posted by Michael_Js

but even with a tune will it fail emissions testing??

no a lot of times with high flow cats you will still pass the sniffer with the same or better and you can pass even easier if the cats are nice and hot so get on it when going to get the inspection lol

but if you don't live in a state that has to pass the sniffer all they do is hook up the obdII check for codes and a visual inspection which i easy to pass because most don't care and the others just look see the cats and have no idea if they are factory location or not so pass

08-16-2009, 06:39 PM	#1
Corvin Drives: Soon to have a 2SS 2010 Camaro Join Date: Oct 2008 Location: Waukegan, IL Posts: 53	ARH Headers Question Now anyone correct me if I'm wrong but I was under the impression that installing these makes your car have error codes. If this is true has there been any word on a fix for it? __________________ So I said.. "I want you to Twitter my Yahoo until I Google all over your Facebook" 2SS/RS - SIM M6 Order# NKNBS6 Reordered on 6/9/09 2G1FT1EW0A9134351 Born on date = 8/10/09 1100, Preliminary order accepted 6/9/09 3000, Order accepted by production control6/27/09 3100, Order available to sequence7/20/09 3300, Order scheduled for production7/20/09 TPW 8/03/09 3400, Order broadcast08/07/09 3800, Order produced08/10/09 2G1FT1EW0A9134351 4000, Available to ship08/11/09 4200, Shipped08/11/09 5000, Delivered to the dealer08/18/09 6000, Delivered to the customer08/18/09

08-16-2009, 07:09 PM	#2
camaro1 Drives: 550+RWHP 2010 camaro Join Date: Sep 2007 Location: wisconsin Posts: 1,588	i have installed several of the long tube header set ups with the small bullet cats and all of them have eventually set the p0420/421 cat efficiency codes, these were not the arh headers but other brands that have the same style small bullet cats only way to fix it is to have a tune done and turn off the codes __________________ 415ci stroker, TVS 2300 Magnacharger, cnc heads, cam, yank ss3200 converter, Kooks long tubes, Bwoody true cold air kit, ZL1 Pump, magnaflow 3" cat-back, lowering springs,BMR control arms and tie rod bars, 3.73 gears, diff mounts, RX can, ADM fuel controller

08-16-2009, 07:17 PM	#3
Corvin Drives: Soon to have a 2SS 2010 Camaro Join Date: Oct 2008 Location: Waukegan, IL Posts: 53	But wouldn't that show up when you have your emissions test done and cause it to fail? __________________ So I said.. "I want you to Twitter my Yahoo until I Google all over your Facebook" 2SS/RS - SIM M6 Order# NKNBS6 Reordered on 6/9/09 2G1FT1EW0A9134351 Born on date = 8/10/09 1100, Preliminary order accepted 6/9/09 3000, Order accepted by production control6/27/09 3100, Order available to sequence7/20/09 3300, Order scheduled for production7/20/09 TPW 8/03/09 3400, Order broadcast08/07/09 3800, Order produced08/10/09 2G1FT1EW0A9134351 4000, Available to ship08/11/09 4200, Shipped08/11/09 5000, Delivered to the dealer08/18/09 6000, Delivered to the customer08/18/09

08-17-2009, 09:35 AM	#6
sscamaro Drives: 2010 2SS, 2017 Silverado LTZ Join Date: Jan 2007 Location: Denver,PA Posts: 3,195 View My Garage	I've put LT headers on my 02 Camaro SS(FLP) and my 05 Corvette(Kooks). I have never thrown a code with either one at anytime. Some will and some won't. __________________ 2010 2SS/RS Victory Red, MN6, 1-7/8 Kooks LT Headers, SLP Axle Back, Edelbrock E-Force S/C, ZL1 Fuel Pump, 72# Injectors, JRE fuel rail upgrade, Roto-Fab CAI, Elite Catch Can, Billet Hurst Shifter, DSS 1000HP axles, Spohn Trailing Arms, Toe Links, Lower Control Arms. Chrome American Racing Torq-Thrust wheels. 546/rwhp & 522/rwtq & 10.9# boost Tune by Jeremy Formato.

08-17-2009, 02:53 PM	#8
Michael_Js SoCal C5 Family Member Drives: 2010 Camaro SS/RS - Black w/IOM; 6M Join Date: Jul 2009 Location: San Diego, CA, USA Posts: 5,299 View My Garage	but even with a tune will it fail emissions testing?? __________________ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~ 2010 Black 2SS/RS; 6M; IOM, GFX, sunroof; ADM Race CAI; Zoomers CB; Viper Alarm; Pdaft F&R sways, Adj Endlinks, Rtrailing arms, Camber kit, strut brace, Front Trailing Arm Bushing; SLP Skip-Shift Elim; Tinted lights/windows; Hurst Short-throw; LoJack; Door & Dash ABL Mods; ********; JBA Shorty headers; AACStyle LEDs; Stillen DS rotors, Hawk Ceramic pads; Havoc Blk Chrome wheels: 20x9s; Lingenfelter Blk Al Pedals; RevXtreme Catch Can; Goodridge SS lines; Ported TB; RK Sport hood; Hotchkis chassis brace; KW V3 coilovers;

08-17-2009, 02:51 PM	#7
A.R. Headers Drives: Pontiac G8 GT Join Date: May 2009 Location: new york Posts: 263	Guys, This is always a popular question. The easiest fix, and consequently what produces the best results, is a tune. This eliminates any possibility of a CEL and at the same time boosts performance throughout the RPM range. Regardless of headers used, tuning is a must. Nick

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