I have a set of vance and hynes big radius pipes from a cross bones and i want to put them on my 2016 soft tail slim. But the bung hole for the o2 sensor is to big. My questin is can i use a reducer and will efect the performane on the bike or will it turn on the sevice light

 

https://www.revzilla.com/motorcycle/...harley-exhaust

 

From what I understand you can go to a muffler shop and have them weld in the correct size o2 sensor bung.

 

No need when the adapters are $12/per and bolt right up.

 

you want to make sure that the o2 sensor protrudes down past the adapter or it will not be in the down stream flow of the exhaust. and won't get a very accurate reading. that is the problem i have been told with those adapters they are to thick and sensors sits to high.