Spot on suggestion. I used the Vance & Hines 3" Slash Slip-ons and put in their version of the dB reducer called the "Quiet Babble" Worked perfect, and a benefit was improved performance (torque and throttle control) on the low end.

Be advised that no matter what you do, there are cranks who will report you to the police as well as police officers looking to make quota. The police officer who came to talk with me after a complaint was filed gave me a good piece of advice. I purchased the "pro" level dB measurement app for my iPhone (cost less than $20) and can show any enforcement official the dB level of my bike and its compliance with local noise ordinance(s).

 

Thanks Fugitive!

 

Hi!
I'm thinking about putting these exhaust for my new FXBB. I understand that these are the "Slash Cut 50 State Legal Slip-Ons" (high flow catalytic + removable DB killers).

There is another model, "Slash Cut EC Slip-Ons for 2018 M8 Softail®" that is valid (legal) for Europe, according to Euro4

Does anyone have them?