I hAVE a 2019 Harley street glide 965 miles. I thinking of changing the stock mufflers at the dealership with slipons cobra neighbor haters chrome 4" Do I need to have them adjust the air & fuel Some say yes some say no. What is your opinion

 

If your just doing slip ons you shouldn't have to remap. If your also going to add a high flow breather(air cleaner) you will have to remap.

 

Aside from the tuning question, you might want to ask the dealer if the Cobras will void your warranty.

 

Agreed watch your warranty. On the other hand , if a harley dealer installs an after market product that voids a warranty without saying something. That's a problem .