Looking for muffler options with a 2 inch or no bigger than 2 1/4 inch baffle for the M8. I'm aware of the S+S mk and grand national with DB reducers that choke them down, also fullsac inserts and FM street outlaw. Trying to see if you guys know any other options out there that fits this description, thanks!

 

Rush or VH twin slash??

 

I have tried several sets on my 2017 with CR460 cam. V&H Eliminators, Magnaflow Knockouts, stock with and without baffles. Mostly good sound but notice the low end loss in power. I keep putting back on the Mutazu Roaring series mufflers they sell on ebay. They have a spiral baffle and really help with low end. Sound great and perform very well.

 

I have the magnaflow knockouts now and love them but a lot have told me they are gonna kill my bottom end with a new cam. How bad was yours with these mufflers? Did you have yours dynoed?

 

I will start by saying I haven’t had the bike dynoed. The Magnaflow is a megaphone style muffler with their 3 step baffle (which is still a very open muffler compared to the spiral honeycomb baffle design, which I have found to perform better in my application (full stage 2 with RCX Tormentor header and CR460 cam). That said, the Magnaflow isn’t horrible, but you will notice it compared to let’s say the Mutazu I have on the bike now. When I was doing some experimenting this spring, I had a set of stock mufflers without the baffles that I put in a set of Thunder Torque inserts. You could notice a nice boost in the low end with those installed (very loud though and I like my tunes) versus without them. I still have the Magnaflows (for sale actually) and if I decide to go back to those I will put in the inserts which should help on the bottom end. Now you are drilling a hole in them, but if you already have them and like the sound might be worth the time and $34 to try them before you go down the rabbit hole I did with exhaust search 

 

Show a dyno sheet today with magnaflows and FM mufflers on the same sheet, the FM mufflers had a little better bottom end but not by a lot, the magnaflows passed them in HP and TQ around 3400 rpms. I think I can live with giving up a little on the bottom just to have the sound of the MF's .

 

I have had quite a few different mufflers on my M8 Road Glide, and I think the deepest sounding ones are the Bassani DNTs. Not a 2" baffle though.

Are you looking for a 2" baffle because you're worried about losing low end performance?


This is the baffle in the DNTs.

 

Yes, talking with the experts and they say this is what the m8 wants and needs to perform it's best.

 

These really mellowed out when I added this little baffle insert; it had a bit of a piercing loudness to it. Really helped a lot.

 

I have not tried this, but think it might be a way to create the proper backpressure in mufflers with large exit openings by bolting one of these in the end of the baffle.