Ok, this might be a stupid question but...my drag dp doesn't have an o2 bung and i was j/w if i need to get one to plug my o2 sensor into right away? i'm getting a full custom exhaust made in a few weeks, will not having an o2 sensor screw anything up or make the car run poorly? i'm just going to use an fmu for now with no tuning at 7psi. thanks.