Is it possible to run open headers if u have just the front o2 sensors and rear o2 simmulators? I'm pretty sure you can't but i just want someone to explain why not. thanx.
-Brent

 

you shouldnt for any extended periods of time...has to do with backpressure not sure exactly why...besides im sure youd get pulled over very quickly as its not very quite think JR dragster lol

 

you have to have some piping or extension after the collectors to prevent outside air from going back up the collector and coming in contact with the front o2 sensors. if this happens the pcm will think the car is running lean and will dump alot of excess fuel in

i run my dual cutouts open all the time, track and street. the opening are 20" away from the o2 sensors

 

I knew that could happen very easily seeing as most of my friends get pulled over with their headers and OR piping. I just wanted to know if it was possible.

 

Thanx alot. This answer is exactly what I was looking for.

 

I'm not buying all of this extension stuff. It really depends on how long your collectors are. MANY cars run open headers at the track all the time with no problems.