02 Sensor extentions
Thread Starter
Drifting
Joined: Jul 2008
Posts: 1,316
Likes: 15
From: Tulsa OK
02 Sensor extentions
I bought a set of OBX headers and need to get some o2 sensor extentions. I've heard there are two different kinds (square/round) and am not sure which one to get for my 98 coupe.
Also, where is a good place to order these from online?
thanks for your help as always!
Also, where is a good place to order these from online?
thanks for your help as always!
Advanced
Joined: Oct 2007
Posts: 76
Likes: 1
From: Cartersville Ga
with that said do a little research before you buy either the extensions or the flat to square adapter. if you use the rear o2s (recommended) you will need the adapter plug
Thread Starter
Drifting
Joined: Jul 2008
Posts: 1,316
Likes: 15
From: Tulsa OK
no you just needf a flat to flat ext... most people use the rear o2s when they delete the rears. the theory behind this is that the rears have higher wattage heaters in them....not true, the holes themselves are designed better to keep them from throwing the infamous codes p1133 and p1153.
with that said do a little research before you buy either the extensions or the flat to square adapter. if you use the rear o2s (recommended) you will need the adapter plug
with that said do a little research before you buy either the extensions or the flat to square adapter. if you use the rear o2s (recommended) you will need the adapter plug
So you say i should block the fronts and then use the existing back ones? Do the rear sensors change position much from stock? What is the adapter for if i am using the stock sensors in the stock position? Sorry for the 20 questions, i just want to make absolutely sure i'm on the right track before purchasing parts.
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
Drifting
Joined: Jul 2008
Posts: 1,316
Likes: 15
From: Tulsa OK
i've had these headers in my garage for 3+ months now anyways 
Instructor
Joined: Mar 2008
Posts: 232
Likes: 2
From: Sacramento CA
I just installed OBX LT's on my 98' Vert, here is what I did:
1. Plug the rear o2 sensor holes in the pipes with the (supplied) plugs.
2. Order (2) front/rear adapter plugs from LG Motorsports
--Give them a call at 972.429.1963, the adapters are not on thier site.
3. Install your rear o2 sensors into the front sensor locations (in header collector)
4. Use the adapters to connect your installed sensors (square plug) to the front harness (oval plug)
5. Have your tuner tune out your rear o2's.
CAUTION: Make sure not to cross the wires from left sensor to right plug. The left sensor must plug into the left harness and right into right.
Have fun getting your o2 sensors into the headers, the OBX design points them right into the tunnel plate. If possible, mock the headers up, mark the area where the o2's will hit the tunnel plate then remove that area of the plate ( cut it out).
Hope this helps.....
1. Plug the rear o2 sensor holes in the pipes with the (supplied) plugs.
2. Order (2) front/rear adapter plugs from LG Motorsports
--Give them a call at 972.429.1963, the adapters are not on thier site.
3. Install your rear o2 sensors into the front sensor locations (in header collector)
4. Use the adapters to connect your installed sensors (square plug) to the front harness (oval plug)
5. Have your tuner tune out your rear o2's.
CAUTION: Make sure not to cross the wires from left sensor to right plug. The left sensor must plug into the left harness and right into right.
Have fun getting your o2 sensors into the headers, the OBX design points them right into the tunnel plate. If possible, mock the headers up, mark the area where the o2's will hit the tunnel plate then remove that area of the plate ( cut it out).
Hope this helps.....
Thread Starter
Drifting
Joined: Jul 2008
Posts: 1,316
Likes: 15
From: Tulsa OK
I just installed OBX LT's on my 98' Vert, here is what I did:
1. Plug the rear o2 sensor holes in the pipes with the (supplied) plugs.
2. Order (2) front/rear adapter plugs from LG Motorsports
--Give them a call at 972.429.1963, the adapters are not on thier site.
3. Install your rear o2 sensors into the front sensor locations (in header collector)
4. Use the adapters to connect your installed sensors (square plug) to the front harness (oval plug)
5. Have your tuner tune out your rear o2's.
CAUTION: Make sure not to cross the wires from left sensor to right plug. The left sensor must plug into the left harness and right into right.
Have fun getting your o2 sensors into the headers, the OBX design points them right into the tunnel plate. If possible, mock the headers up, mark the area where the o2's will hit the tunnel plate then remove that area of the plate ( cut it out).
Hope this helps.....
1. Plug the rear o2 sensor holes in the pipes with the (supplied) plugs.
2. Order (2) front/rear adapter plugs from LG Motorsports
--Give them a call at 972.429.1963, the adapters are not on thier site.
3. Install your rear o2 sensors into the front sensor locations (in header collector)
4. Use the adapters to connect your installed sensors (square plug) to the front harness (oval plug)
5. Have your tuner tune out your rear o2's.
CAUTION: Make sure not to cross the wires from left sensor to right plug. The left sensor must plug into the left harness and right into right.
Have fun getting your o2 sensors into the headers, the OBX design points them right into the tunnel plate. If possible, mock the headers up, mark the area where the o2's will hit the tunnel plate then remove that area of the plate ( cut it out).
Hope this helps.....
I had heard i was going to need to cut out holes for them in the tunnel plate
Great information! That will help me get these finally installed
Appreciate all your help guys.
Banned Scam/Spammer
Joined: Feb 2007
Posts: 50,093
Likes: 267
From: Oklahoma City
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16-'17,'19,'22
I used the fronts on the front of mine and they work fine.
I installed the same headers on my ride. Make sure you take the tunnel plate off to cut the hole. It's a lot easier. I wasted about an hr trying to do it on the car. Also the theads in the slots for the 02 sensors suck! They hardly ever go in smooth. It will take some work.
When are you installing those Dustin?
I installed the same headers on my ride. Make sure you take the tunnel plate off to cut the hole. It's a lot easier. I wasted about an hr trying to do it on the car. Also the theads in the slots for the 02 sensors suck! They hardly ever go in smooth. It will take some work.
When are you installing those Dustin?
Le Mans Master
Joined: May 2006
Posts: 5,987
Likes: 18
From: DuBois PA
St. Jude Donor '11-'12-'13-'14-'15
How short do the fonts end up? On my install (different Headers though) I unclipped the connectors from the frame and that gave me enough slack to use the stock wiring...
ISIS SUCKS FAT CHOAD
Joined: Oct 2008
Posts: 8,124
Likes: 53
From: Earth, United States
I have OBX longtube headers and I just ordered my O2 sensor extensions (flat to square connectors) from LG motorsports yesterday. Super people to work with. very easy transaction.
Thread Starter
Drifting
Joined: Jul 2008
Posts: 1,316
Likes: 15
From: Tulsa OK
I used the fronts on the front of mine and they work fine.
I installed the same headers on my ride. Make sure you take the tunnel plate off to cut the hole. It's a lot easier. I wasted about an hr trying to do it on the car. Also the theads in the slots for the 02 sensors suck! They hardly ever go in smooth. It will take some work.
When are you installing those Dustin?
I installed the same headers on my ride. Make sure you take the tunnel plate off to cut the hole. It's a lot easier. I wasted about an hr trying to do it on the car. Also the theads in the slots for the 02 sensors suck! They hardly ever go in smooth. It will take some work.
When are you installing those Dustin?
I'm hoping to get these on before thanksgiving...but at this rate i'm not sure.
Instructor
Joined: Aug 2008
Posts: 204
Likes: 0
From: Lake Placid Florida
I just got my OBX headers installed also. We used the front O2 sensors in the front with O2 extensions (flat connector for fronts, square for rear) and plugged the rear ones. Got the extensions from Speed Inc, great service there. Only problem was the check engine light, no error codes on the DIC. Now the computer is at ECS for tuning and I can't wait for it to return. The friend who installed the headers does a lot of these and even custom builds headers and was pretty much impressed with these, especially for the price. 