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[mgreen3940]

I have a 2013 CVO Road Glide Custom that has the cone heavy breather on it.  I recently had a new exhaust put on and tuned with a SE tuner.  I'm now wanting to put lower fairings on and found the stock breather won't work.  So I got a SE extreme billet agitator high flow breather.  Do I need to retune again even though both breathers are high flow?

[Midnight Rider]

I'd run it and see how she drives.  IF I'm not mistaken, the heavy breather offers two different sized air filters, one being slightly shorter than the other, which would work with lowers IF you do not have speakers in the lowers.  But since you already purchased the other one, it's a mute point.  My thinking, and I could be wrong, is that there will not be a significant enough difference to matter, if there's any difference at all, and the ECM should adapt to a small change like that.  It can "learn" to a point.  I'd take it for a 100 mile ride or so and see how it works out.

[Rio]

I think it will be a wash, higher airflow will be offset by restricting air flow with the lower fairings.

[mgreen3940]

Thanks for all the quick responses.  Yeah, I'd want to add speakers to the lower fairings hence this style of breather.  I'll take the advice so far and ride her for a couple hundred miles to see what she does.  I'll let everyone know how things go.  Going to post pics of it in the morning to here so everyone can see.