ok and what about sensor placement and or "crosstalk" what someone was saying earlier in this thread? and what is the dual bungs? i have no idea what that is, sorry im new to all of this.

 

I got the bungs
Bungs are pipe threaded holes or bungs welded to your pipes to screw in O2 sensors
Some pipes have no bungs as the Engine management system does not use O2 sensors
Some have 2) 12mm bungs down by the cat for narrow band oxygen sensors
Some have 2) 18mm bungs up by the heads for wide band oxygen sensors.

My Power Commander V installation asked me to remove my 12mm O2 sensors. Power commander sells an Autotune that requires 18mm wide band sensors so I ordered head pipes for my bike with the 18mm bungs. As I have not installed Autotune I am not using any O2 sensors so my bung holes are plugged

 

18mm bungs which are placed closer towards the end of the headpipe that connects to the exhaust port so they can be heated by the airflow are used to tune your bike in what's called open loop or wide band tuning. Any reputable tuner when you bring your bike in for tuning, if the pipe doesn't have 18mm bungs, then will drill a hole in your head pipe, install a rivnut, install a wideband sensor, tune your bike in the closed and open loop ranges, pull the sensor insert a screw through the rivnut to seal it back up and send you on your way. If you already have 18mm bungs they will simply screw their wideband sensors into the bungs and tune. Open loop tuning mainly consists of higher RPM and higher KPA ranges that you're normally never in such as wide open throttle. These sensors feed information back to the ECM or tuning device to help it adjust.

12mm bungs which are placed lower in the pipe at the collector on your bike, are heated as well but electronically, and are used to tune your bike in what's called closed loop or narrow band. 12mm sensors also feedback information to the 10 and up ECMs to help it "self-adjust" for varying riding conditions and loads. Closed loop tuning is usually where you ride cruising or under normal acceleration, etc.

Crosstalk IMO is an anomaly that rarely if ever happens at least that I've seen myself, read about, talked with Steve Cole, Doc, and other experienced tuners about but it can happen in the right circumstances and usually with a stock head pipe and usually caused by something else. I wouldn't concern myself with this.

Sensor placement is crucial to good air flow readings whether it be 18mm or 12mm sensors.

 

sorry I forgot to clarify that 07, 08, 09 touring bikes although equipped with 18mm sensors are actually considered narrow band sensors.

 

so i should get the extra bungs to be safe? this will be going on a 2014 flhxs by the way.

 

Did it both way I prefer the 2-1-2 fuel moto headers . Sounds better tunes easier.
removing Cats from stock headers works but not he best.

 

only reason I didn't is because Steve didn't have any in stock at the time I ordered and I didn't want to wait. But for $20 yes I'd get them. Your tuner will be happy he didn't have to pull your heatshields and drill a hole in your head pipe for the rivnuts. Not to mention if you go with a tuning device such as PC or PV then you can add their wideband sensors without issue.

 

ok last question, you have been very helpful so far and thank you so much. now what is the CVO power core thing? do i need that if im running the dx header and cfr slip on?

 

CVO insert thing?

 

sorry the CVO power core.