I just installed Cobra Neighbor Haters on my 2020 Iron 1200. No need to retune.

 

Be sure to slip over on the welcome area a make your second post..

Just in case you prefer not..

Welcome from North Beach, FL., USA!

Just in case you have not done both of these two important items!

Be sure to add an Avatar of your favorite shot in the USER set up for the small picture others will see in the top left corner of your post with your USER name.

And most importantly a Signature Line in your USER set up for your bike model, year, and all the letters that Harley recognizes it with that others see at the bottom.

This enables others to know your exact model if you ever ask a question or another member interested in it may ask you a question about it.

​​Your all set.... Enjoy the ride! ______________

 

Also 1 more thing. It would be a good idea to drill a 3/16 hole in the bottom side of each muffler where it slips on and use a 3/16 steel rivet to make sure slip ons won't come off. I lost a set because I didn't and they were clamped down tight. Talked to an old HD mechanic and he told me they do it.

 

Mufflers or slipons are held on with a torca clamp and 2 bolts. On newer bikes 2017 and up there is also a muffler header gasket.

If a torca clamp comes undone it was not done up correctly IMO.

ETA: Torca clamps are single use and if reused more than a couple of times they will probably fail as parts get stretched when done up properly.