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SR Performance O2 Sensor Extension Kit - Pair (86-10 All)

Item 56013
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    Features, Video & Details

    • Extended O2 Sensor Harness
    • Great for Modified Exhaust Systems
    • Easy Installation
    • 18" Long
    • Sold as a Set of Two
    • Fits All 1986-2010 Mustangs

    Review & Installation Video

    Review & Install Video

    So you just installed a new set of long tube headers or an aftermarket midpipe, and now your factory O2 sensor harness is a little too short. If that sounds like you, this O2 sensor extension kit is your solution. This kit for your ’86-’09 Mustang includes two harnesses that extend both your primary and secondary O2 sensor wires by 18 inches. That should be enough to bridge the gap between your factory O2 sensors and your factory harness. The great thing about this kit is that it’s completely plug and play, so there’s no need to hack up your factory harness in order to extend your wires. It’s a very straightforward install that should take you no more than a few minutes. If you’re pumped to install that new off-road x-pipe, or that new set of headers, only to find that your O2 sensors no longer fit, this kit will solve that problem easily without breaking the bank.

    "Plug and play". When your modify your exhaust system, sometimes the stock O2 sensor harness just comes up too short to connect the O2 sensors, but this SR Performance harness extension kit will help bridge the gap.

    Great for modified exhaust systems.
    If your stock wiring harness is too short to connect your existing O2 sensors to a new set of headers or a mid pipe, don't just leave the old wires dangling - because your car just won't pass inspection. Instead use a set of 18" O2 Sensor Extensions to make the connection a snap.

    Application. This pair of SR Performance O2 Sensor Extensions is designed to fit on all 1986-2010 Mustang exhaust system configurations.

    Please Note. The Extensions are intended for use to extend to upstream O2 Sensors; however, they can be used upstream or downstream if needed.  O2 Sensors are not included.

    Technical Note. Removal of directional tabs on connector ends may be required for proper fitment on some applications.

    SR Performance

    Fitment: 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 Details

    MPN# 56013

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (2) O2 Sensor Extensions
    Installation Info
    Tech Specs
    Will it fit my Mustang?
    • Bullitt - 01, 08, 09
    • Cobra - 93, 94, 95, 96, 97, 98, 99, 00, 01, 03, 04
    • Cobra R - 93, 95, 00
    • GT - 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10
    • GT500 - 07, 08, 09, 10
    • LX - 87, 88, 89, 90, 91, 92, 93
    • Mach 1 - 03, 04
    • Other - 86
    • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10

      Customer Photos (17) Submit Your Photo

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        Questions & Answers (24)

        5 Top Rated Questions

        Do i still need to turn off the rear o2 sensors if I use this with an off road a-pipe?

        • The check engine light will still appear as this would just be an extension harness so you can plug your o2 sensors up with long tube headers installed.

        Helpful (3)

        Do you still need to turn off your rear o2 sensors when using this with an off road xpipe? Bbk off road to be specific.

        • These will not remove the check engine light when doing an off-road mid-pipe since these are just an extension to still bolt up the o2 sensors.

        Helpful (2)

        I have an 08 GT w/ Kooks LT headers, Kooks catted H-pipe, Ford Racing Exhaust, Ford Racing Hot Rod Cams, Steeda CAI, and Dyno tune. My check engine light has been triggered since I had the car dynoed. The code is for the cats. I believe it is a false reading because the catts are high flow. The bama tune I had prior to getting it dynoed turned off specific functions of the computer to prevent this problem. Will these extensions keep the light off?

        • The SR Performance O2 Sensor Extension Kit is simply an extension so the harness will reach when the O2 sensors are relocated, such as with Long Tube headers, but this will do nothing for check engine lights..

        Helpful (1)

        Does A bad O2 sensor make the rpm flutter? And engine cut in and out

        I have a 2008 GT500 and I was about to buy an offroad H-pipe and a set of MIL eliminators. However, I can't find MIL eliminators for my body style. These 02 sensor extensions are all I can find. Do they keep the check engine light from coming on when removing cats?

        • This is simply to extend the oxygen sensors on your vehicle when upgrading your exhaust. We do not carry MIL eliminators or any other piece to remove the check engine light.

        Helpful (0)
        10 More Questions
        I have a 2004 mustang GT and I’m looking forward to buying a BBK o/r x pipe, I don’t want the check engine light coming on so would these help or do I need MIL eliminators? 1 answer
        I’m thinking of buying the slp loudmouth exhaust for my 04 Mustang got but was wondering if I would need these? 1 answer
        I’m planning on putting BBK long tubes and catted H-pipe on my 03, will I need these O2 extensions? 1 answer
        I am installing jba longtubes and jba catted h pipe on my 07 gt. Will i need one pair or two pairs of these extensions? 1 answer
        Will I need these extensions on a 04 Cobra with stock manifolds and a Mac Pro chamber? 1 answer
        i'm modding on a budget. i'm planning on getting pacesetter long tube headers and kooks catted h pipe. will installing this stop the engine light or would i have to find eliminators (not trying to run a tune) 1 answer
        Would I need these for my 2014 mustang v6 if I was going to order the chambers off road h pipe? I have touring axle backs and I want to increase the sound but not make it too loud. I heard I need these so the sensor doesn't come on? 1 answer
        will this fit on my 2006 4.0 mustang for the downstream o2 sensors? 1 answer
        Will these work and fit properly on MAC long Tube headers?? 1 answer
        I was adding an off-road H pipe and long tube headers on my 08 mustang. Does that require me to use a Mil eliminator and these O2 sensors? I cannot find 05-09 mil eliminators online so does that mean I will only need these extensions and the check engine light will stay off? 1 answer

          Customer Reviews (100+) Write a Review

          Overall Rating 4.5

          out of 5 stars

          • 3/5

            November 12, 2019


            Another cases you do have to snip off the tips of each side to make them fit but in other words they're nearly almost impossible to snip together so the wire attaches to the other side because the clip is not long enough to attach it so you have to make a couple of modifications but in other words it does work for the O2 sensors


            Year: 2010 Submodel: V6

            Helpful (0)

          • 5/5

            November 01, 2019

            O2 ext

            They are great quality very sturdy and my shipping was fast and prompt


            Year: 2006 Submodel: GT

            Helpful (0)

          • 4/5

            October 24, 2019

            Nothing is perfect.....

            Used these for the upstream sensors on my '06 GT. I had to trim off the alignment tabs on the connectors to fit, like the text in the notes mentions. I should also mention that the protective sheathing on one of the cables was worn through where it was bent in the packaging. No idea how this happened, but since I didn't have time to order another cable, I just put ribbed plastic tubing over both cables and called it a day. Plenty of length on the pass. side, just enough on the driver's side, with Py... long tube headers. No MIL's yet.


            Year: 2006 Submodel: GT

            Helpful (0)

          • 3/5

            October 23, 2019

            Did not fit

            They did not fit initially. I had to cut the tabs off the side and then slide them in. The tabs were misaligned.


            Year: 2008 Submodel: GT500

            Helpful (0)

          • 5/5

            October 13, 2019

            Great !!

            Great product, great price and excellent quality.. I installed a set of long tube headers and these were just what I needed because the 02 sensors were further away...


            Year: 2003 Submodel: GT

            Helpful (0)

          • 4/5

            October 13, 2019

            I made them work.

            I can only speak for my car but technically these do not work with an 05 GT. They come with this little tab on them and it will not allow them to connect. However I took a box opener and just cut the tabs off (very easy to do came off very easy and clean) and made them work and they work perfectly fine. I can't give them a perfect five star because technically, they don't fit without modification.


            Year: 2005 Submodel: GT

            Helpful (0)

          • 5/5

            October 03, 2019

            Great Quality

            Received these, but in the end, did not need them, but the quality of the product is excellent


            Year: 2006 Submodel: GT

            Helpful (0)

          • 2/5

            September 30, 2019


            It was a long prices but it looks great well worth the expense. Now its time for the heart of the vehicle to be redone.


            Year: 2001 Submodel: GT

            Helpful (0)

          • 4/5

            September 16, 2019

            Good Product

            Worked great and was easy to install. Only bad thing about them is that they only work for your downstream O2 sensors.


            Year: 2006 Submodel: GT

            Helpful (0)

          • 4/5

            August 19, 2019

            Good Fit. Good Length.

            For the stock connectors on my 2010, i just had to file down the alignment tooth on the end going into the car and these worked just fine.


            Year: 2010 Submodel: GT

            Helpful (0)

          • 5/5

            July 06, 2019

            Making my own

            Looks like I'm going to have to make my own MIL eliminators


            Year: 2003 Submodel: GT

            Helpful (0)

          • 5/5

            July 02, 2019

            worked just like I expected

            Length was just right to extend the front o2 sensor wires to reach the collector at the end of my long tubes, and to extend the rear o2 sensors further back into my x-pipe


            Year: 2005 Submodel: GT

            Helpful (0)

          • 5/5

            June 25, 2019

            Great product

            I simply had to cut the two little ends on each connector to get them to fit properly. They work as intended and give plenty of room for the 02s.


            Year: 2004 Submodel: GT

            Helpful (0)

          • 5/5

            June 14, 2019

            Exactly what I needed

            Great fit worked well easy to install wires were more than long enough for my needs


            Year: 1995 Submodel: GT

            Helpful (0)

          • 5/5

            June 11, 2019

            Good Product

            Very easy to install. Worked as expected. The hardest part of this insall was reaching the sensor on the passengers side behind the engine.


            Year: 2005 Submodel: GT

            Helpful (0)

          • 5/5

            June 07, 2019

            Working as needed

            Arrived on time and is performing as expected the price was reasonable and the installation was easy


            Year: 2007 Submodel: GT

            Helpful (0)

          • 5/5

            May 20, 2019

            Great Product!

            Great if you have long tube headers and need and extension!


            Year: 1999 Submodel: Cobra

            Helpful (0)

          • 5/5

            April 30, 2019

            Just what I needed

            I recently had Pacesetter LTH’s and an MRBP catted h-pipe installed. Had the O2 sensors, but they weren’t hooked up. Of course CEL was on. Ordered these extensions, and it was just what I needed Easy 10min install. Hardest part was determining where to put the zip tie! Drove the cars around for a few days, let the CEL clear and BAM! Done!


            Year: 2010 Submodel: GT

            Helpful (0)

          • 1/5

            April 28, 2019

            Don't fit 07 GT upstream O2

            The passenger side up stream o2 sensor harness stops way up by the top of the bell housing on my 07 GT so i was told to buy these to get it to reach the longtube. It doesn't fit, the tabs are in the wrong position to hook up to the cars harness. They plug into the down streams (which weren't my issue) but not the up streams. Little disappointed at that.


            Year: 2007 Submodel: GT

            Helpful (0)

          • 5/5

            April 26, 2019

            O2 sensor extension

            This extensions are a must if installing long tube headers


            Year: 1996 Submodel: Cobra

            Helpful (0)

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