saj716

I'm installing the LG LT Street header system. Which sensors do I install? Do I just install 2 of them?

I have to two 24" extensions that came with the system.
There are also 2 fittings on the headers, and 2 on the tubes before the xpipe


I have an 04 C5.

Thanks in advance

jacks996

just install the fronts and put plugs in the rears and have the rears tuned out

saj716

Thanks for the quick reply...

so do I use the exhaust manifold sensors and add the extensions. Or do I use the rear sensors of the old system.

Vega$Vette

The sensors are the same. When I did LG Streets on my kids FRC they cam with O2 sims from LG. Use the extensions to extent the harness from to old front sensor location the the new location on the Streets.

saj716

Thanks for the replies...
Still confused though.
Possibly because a '04 is different?

I have 4 original sensors (2 front and 2 rear)

The headers have 2 fittings. Then there are 2 on the tubes before the headers.

I guess I will using the header fittings for the sensors and plug the 2 on the tubes in front of the x pipe and have the tuner take them off the computer

Now for the question..Which sensor do I use? The one that was from the manifold (the short wired ones with the LG wire extension), or the 2 longer ones which where the originally the rear sensors.

Thanks again!.

Vega$Vette

Move the rear ones to the front. Then use the extensions/adapters to plug them into where the front ones originally plugged into. Be sure not to cross them.That a common problem for guys when they install headers. You will still need O2 sims or will have to program out the rears or you will get CEL.

Corvette Don

So on my 2000 I can use the rears on the front?? (my fronts are bad) sry to but in saj716

Vega$Vette

Yep. Sensors are the same just read for different parameters buy the PCM

Corvette Don

Did not know that, I am now in the process of changing them out (taking my bad fronts out and putting my good rears on, I have no cats), thanks for saving me $150.

Vega$Vette

Just send me $75 then.

Corvette Don

Well I got under there and the connections are different

Vega$Vette

Yes that's why LG ships you the Extension/Adapters.

Just cut the connectors off the bad sensors and connect it to the good sensors making sure the wires are connected to the same color wires.

ps. I do have 2 good front sensors i can send you for $75 shipped.Is this connector the same?

Blue Blood

I just installed my LG LT's today and since I purchased them used, from LG I orderd what I thought were extensions for the rear sensors to move them behind the cats. What I received were adapters to move the rear sensors to the front. According to the tech at LG, the front and rear are not the same, rear heat up faster so that's a good thing.

Corvette Don

Wont the connections from LG make it to where you have to do NO cutting? And yes those are the right connections

Blue Blood

If someone wants the adapter harnesses to switch the back to front I may have a set for sale. I think I am going to order the extensions that will allow the use of all 4 cats, but it may not be until the end of this week before I have them available.