On long-tube headers (Pacesetter, LCE, or Thorley), I'm not seeing a port for the sensor where the the sensor normally is on the stock manifold. When putting on a long tube header, does that sensor need to be rerouted? Those systems come with a sensor port down by the cat, which is a different sensor, altogether, I believe. Stock exhaust has two sensors. Aftermarket long tube headers only have one. Am I missing something?

Thanks

 

Manifold, not Mainfold. That sounds weird.

 

Just depends on what you started with

The older engines only had one O2 sensor The newer ones have upstream and down stream ones.

 

I just got home and looked at the stock manifold, there is no sensor hole like I thought, just the flat in the cast, so I think I only have one sensor, presumably O2, which is down by the cat. Thanks

 

I believe the downstream sensor is limited to California vehicles. But it does support code 27, which helps monitor the cat, so if it showed up in a non-California vehicle that would be a good thing.

 

These companies have different versions depending on your sensor setup. Yes, on a CA truck we have sensors pre and post CAT, both adjacent to CAt (at least my 93 does)