O2 Sensor when changing exhaust FXDWGi

twistedpixel said:

I keep reading comments on various sites about O2 sensors and changing exhausts.

When I finally make up my mind whether to go with the V&H Big Shots Staggered or the V&H Big Radius 2-into-2, do I need to worry about these?

I thought that new exhausts came with the hole for the sensor and it was a case of blocking this hole if you have the carb version (no sensor), and that for fuel injected models the sensor from the old exhaust screws into the new exhaust.

is that correct?

Click to expand...

Yes... :thumbsup

twistedpixel said:

I keep reading comments on various sites about O2 sensors and changing exhausts.

When I finally make up my mind whether to go with the V&H Big Shots Staggered or the V&H Big Radius 2-into-2, do I need to worry about these?

I thought that new exhausts came with the hole for the sensor and it was a case of blocking this hole if you have the carb version (no sensor), and that for fuel injected models the sensor from the old exhaust screws into the new exhaust.

is that correct?

Click to expand...

It's mostly correct.

On new models, if you have a piggyback ECM unit like a power commander, you actually leave the O2 sensors unplugged, and could just remove them entirely and plug the holes if you wanted.

The other issue is for people who want to use a wide band O2 sensor, rather than the stock narrow band, again in conjunction with an aftermarket unit. In that case, with most exhaust you'd need to weld in a new bung to fit the new sensors.

If you are going to use the stock narrow band O2 sensors, however, yes the new headers should have the bungs and you can just use them as is.

^^^ This.

Keeping in mind, 2007-2009 bungs are for 18mm O2 sensors, where as 2010 and up are 12mm.

Adaptors can make the 18mm bungs 12mm bungs.

Please make me type BUNG one more time.

Dave63 said:

Please make me type BUNG one more time.

Click to expand...

What`s the name of the part again?
your welcome.

BUNG? Never heard of her? Asian hooker?

Dave63 said:

Please make me type ____ one more time.

Click to expand...

Ok. Lets try it this way. Fill in the blank.