Do I need O2 extensions?

[Gxsa140]

I asked this in the exhaust forum, but it doesn't seem as many people view that one. Does anybody know?
I just ordered the Magnaflow catted X for my '04 and was told that I may need O2 extenders. Is this true? Just wanted to check with everyone, and is Brother's Performance a good place to get them?

 

[darkshadow03]

Yes You Need Them! 04's They Moved The O2's Further Back!

 

[Justin Blake]

Yes, I ran into this problem this weekend. Luckily mine were turned off in my tune.

 

[Gxsa140]

Thanks for the replies...........
Justin...Your car is the reason I went with the catted x to go along with the catback. Your car sounds really good.

 

[Justin Blake]

Thanks for the replies...........
Justin...Your car is the reason I went with the catted x to go along with the catback. Your car sounds really good.

Thanks :beer:

 

[04TRCobra]

can u just get them turned off via tune if you get a catless x-pipe???

 

[Justin Blake]

can u just get them turned off via tune if you get a catless x-pipe???

Just about every tuner out there, amazon, rwtd, they all turn them off anyway that way they don't have to mess with it later. It won't affect any thing even if you are still running stock cats.

 

[smokincobra04]

i bought o/rx pipe bassani and bassani catback do i need them do u think

 

[Justin Blake]

i bought o/rx pipe bassani and bassani catback do i need them do u think

Who tuned it?

 

[FireRed04Vert]

To the best of my knowledge, all the rear sensors do is compare exhaust from the front 02 sensor to see if the cats are performing as designed. I don't believe they use them to control the factory tune.

 

[smokincobra04]

nobody tuned my car im just putting the exhaust on, do i need them?

 

[Nino]

O2 Extensions and MIL Eliminators are two seperate things. One pair of O2 Extensions are needed on 2004 Mustangs because the rear O2 sensor harness is not long enough to reach the rear O2 bungs on aftermarket mid-pipes. O2 Extensions do nothing to prevent the check engine light from turning on if you run an off-road exhaust.

MILs are electronic devices used to prevent the check engine light from turning on when running an off-road exhaust. 2004 Mustangs with off-road mid-pipes will need both O2 Extensions and MILS.

We have both items at Ninosport.com and they are the plug-in kind that do not require any cutting and splicing of the factory wiring harness. That may be important when taking your car in for service as the dealer will probably not like to see a cut factory harness.

Use the "SVTP.com" discount code to save an extra 5% when checking out!

-Nino

 

[Nino]

To the best of my knowledge, all the rear sensors do is compare exhaust from the front 02 sensor to see if the cats are performing as designed. I don't believe they use them to control the factory tune.

That is correct. The rears are more like catalyst converter monitors.