What can be done to an M8 to make it sound like a real Harley and LOUD?
Have a 2018 Street Glide Special and want some sound out of it. Had a 07 Street Glide with V&H Big Radius pipes and chasing that sound and volume again!
I have already tried Cobra Neighbor Haters, and SVT Boneshakers. Still stock headers, but want ideas before I throw money at this bike. Videos or sound clips welcome.

 

Not that easy. If you open up a set of slip ons and remove the baffles it will be loud, however, you will suffer in the low end. With the baffles in, most slip ons will be quiet at idle and cruise.

If you want the loudest, I would think you should get a 2:1 like the D&D. The catalytic converter real muffles the M8s.

So far, I have had the following on my 2018 RGS.
1. CVO mufflers with FULLSAC baffles (not loud)
2. SE STREET CANNONS (better than stock)
3. Bassani DNT Straight Can slip ons (nice deep tone, better than stock)
4. TAB slipons with Zombie and 2.5" baffles (Zombie baffles are the loudest, sound mean when on the throttle, not obnoxious; 2.5 baffles are better than stock, easy to cruise with, not obnoxious)
TAB WITH ZOMBIES ARE FOR SALE (gotta get a D&D 2-1)

Would like to hear someone's bike with Magnaflow Hitmans, supposed to be nice. Maybe I'll find these at Born Free this weekend.

If I was to choose my favorites, first choice would be Bassani DNT, second would be SE STREET CANNONS.

 

 

Decat and cam. Simple as that.

 

 

 

 

The way these new motors are setup, you'll never get that old school harley sound. It wont even sound much like a twin cam.

Also, you'll never get any good idle sound until you upgrade your exhaust and cam. As others have said, these bikes are pretty sensitive and you have to take care that you dont lose power in the hunt for sound.

lyork's bike sounds about as good as you''ll get. As does mine below. Idle to me will still be much quieter than harleys before.

 

Are these TAB performance with no baffles? I ran the same pipes for a few months and lost pretty much all of the torque. They did sound nice though..... Still not as loud as some of the twin cams with just slip ons. My Reinharts are nice and have gotten louder as they break in.

 

You need to ask yourself if keeping your powertrain warranty intact is less important than trying to get that "Harley sound".

You'll probably be fine with any of the slip ons that are available but if you start messing around with non SE tuners and new headers you're going to have issues.