Ok I have a few questions. I have a 92 Z28 350. So I'm in the middle of installing the Hedman 68470 shorty headers. So far it's been a pain, but I am getting through it. Driver side is in and I guess those lines going into the stock headers were the smog control? The part that I disconnected it from can I remove the whole thing or just leave it unconnected? The headers I have don't have insert for the o2 sensor, can I just eliminate it? What parts in the engine pay can be removed now since I'm installing the headers?

 

I'm guessing you're running TPI? In lieu of the AIR system (lines that ran up to the OEM exhaust manifolds); if you don't have to worry about emissions control inspections, you can completely remove those lines and the smog pump (on mine it was located on the bottom pass side of the motor, underneath the alternator). Some people will try and give you crap for removing it, but oh well. As for the O2 sensor, you have one of two choices, either buy a O2 bung and either do it yourself or have someone drill a hole and weld the bung onto the header (driver's side typically @ the collector), or you can technically delete it, which would involve having the chip re-programmed for an O2 delete. IMO, I would just buy the O2 bung (like $10 from Summit Racing) and keep the O2 sensor. I personally think it's better/easier than trying to trick the computer.

 

Yeah there is no emissions test. For the o2 sensor, it's really just for the check engine light right? It would cause the car to run different, would it? Thanks for the reaponse

 

No, the O2 sensor is required.

 

Automotive oxygen sensors, colloquially known as O2 sensors, make modern electronic fuel injection and emission control possible. They help determine, in real time, if the air fuel ratio of a combustion engine is rich or lean. Since oxygen sensors are located in the exhaust stream, they do not directly measure the air or the fuel entering the engine. But when information from oxygen sensors is coupled with information from other sources, it can be used to indirectly determine the air-to-fuel ratio. Closed-loop feedback-controlled fuel injection varies the fuel injector output according to real-time sensor data rather than operating with a predetermined (open-loop) fuel map. In addition to enabling electronic fuel injection to work efficiently, this emissions control technique can reduce the amounts of both unburnt fuel and oxides of nitrogen entering the atmosphere.