AR Headers for 2011 GS > O2 Sensor Extensions question
Thread Starter
Race Director
Joined: Mar 2011
Posts: 13,262
Likes: 3,150
From: SW Florida
2021 C6 of the Year Finalist - Modified
AR Headers for 2011 GS > O2 Sensor Extensions question
I am thinking about installing a set of 1 3/4" AR headers with cats on my 2011 GS (A6).
My question is concerning the O2 sensors. I understand there are 4 total (2 pre-cats and 2 after-cats rear sensors)
1. Do I need O2 wire extensions for the 2 front pre-cat O2 sensors?
2. Do I just not use the rear after-cat O2 sensors, or would it be best to still use the rear O2 sensors? ... If I use the rear O2 sensors, do I need wire extensions for them?
Thank's,
Ron
My question is concerning the O2 sensors. I understand there are 4 total (2 pre-cats and 2 after-cats rear sensors)
1. Do I need O2 wire extensions for the 2 front pre-cat O2 sensors?
2. Do I just not use the rear after-cat O2 sensors, or would it be best to still use the rear O2 sensors? ... If I use the rear O2 sensors, do I need wire extensions for them?
Thank's,
Ron
Last edited by Turbo6TA; Feb 13, 2012 at 05:02 PM.
Thread Starter
Race Director
Joined: Mar 2011
Posts: 13,262
Likes: 3,150
From: SW Florida
2021 C6 of the Year Finalist - Modified
Thank's Brian .... I just figured that the OEM sensor wires for the front would fit on the front of the AR headers without needing to be lengthened.
Well, I guess all 4 sensors need longer wires.
Well, I guess all 4 sensors need longer wires.
Safety Car
Joined: Apr 2010
Posts: 4,231
Likes: 451
From: Maryland
How I saved two bits! AND looking good doing it.
I striped the front sensor wires out of the wire loom to the rear of the engine than installed plastic loom over the wires, then re-wrapped the looms on top of the engine with good electrical tape.
Now when you add in the length of the front O2 sensor wires it connects up fine. The front bungs on my off brand headers are located approx. at the rear of the engine but I could go back further. Worst case is that you would have to buy front extensions. You will need to buy the rears.
The reason I did not buy the front extensions is that I don't like having more wire and connections running all over the place under the hood than necessary.
Now when you add in the length of the front O2 sensor wires it connects up fine. The front bungs on my off brand headers are located approx. at the rear of the engine but I could go back further. Worst case is that you would have to buy front extensions. You will need to buy the rears.
The reason I did not buy the front extensions is that I don't like having more wire and connections running all over the place under the hood than necessary.
Last edited by C7/Z06 Man; Feb 12, 2012 at 09:09 PM.
Racer
Joined: Mar 2006
Posts: 265
Likes: 3
From: Metamora, IL
Good choice going with AR Headers. The headers will come with everything you need, including extensions for the rear sensors. I would recommend you either reuse your OE gaskets or buy a new set of OE exhaust manifold gaskets from your favorite GM parts source. Give Chuck a call, he can answer all your questions from what headers you need for your application to correcting your current tune. Enjoy!
Former Vendor
Joined: Nov 2005
Posts: 11,792
Likes: 255
From: Ossining New York
St. Jude Donor '07-'08-'09-'10-'12-'13-'14
We always re-use the OE gaskets....
Good choice going with AR Headers. The headers will come with everything you need, including extensions for the rear sensors. I would recommend you either reuse your OE gaskets or buy a new set of OE exhaust manifold gaskets from your favorite GM parts source. Give Chuck a call, he can answer all your questions from what headers you need for your application to correcting your current tune. Enjoy!
I also use the Permatex "ULTRA COPPER" silicone on both sides of the factory gasket....
Hundreds of sets installed with NOT LEAKS or problems.
Chuck CoW
Racer
Joined: Apr 2006
Posts: 495
Likes: 1
From: Valley Stream NY
Talk to Nick at ARH, he will recommend the 1 7/8 tubes on the LS3. I have them on mine..........very nice fit and performance gain. Mine is an A6 also.
PS....get a set with a wide band bung in them. This way if you decide to have a wide band tune later on, it will be easier for the Tuner.
PS....get a set with a wide band bung in them. This way if you decide to have a wide band tune later on, it will be easier for the Tuner.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Thread Starter
Race Director
Joined: Mar 2011
Posts: 13,262
Likes: 3,150
From: SW Florida
2021 C6 of the Year Finalist - Modified
Thank's everyone for your comments.
I didn't think the AR headers for the 09-12 cars came with O2 wire extensions.
I see they are available separately as AR P/N: C602EXH and fit all C6 and ZR1 cars (list price of $114 on the AR website)
I didn't think the AR headers for the 09-12 cars came with O2 wire extensions.
I see they are available separately as AR P/N: C602EXH and fit all C6 and ZR1 cars (list price of $114 on the AR website)
Former Vendor
Joined: Nov 2005
Posts: 11,792
Likes: 255
From: Ossining New York
St. Jude Donor '07-'08-'09-'10-'12-'13-'14
Ron... Do you want????
AR HEADERS ARE THE BEST! But, if you want RAW TORQUE, Consider
3.42 REAR END and 2800 CONVERTER PACKAGE....
You'll love it!
Chuck CoW
Drifting
Joined: Dec 2008
Posts: 1,767
Likes: 2
From: Melbourne, Arkansas
Cruise-In X Veteran
Mark
