Slip ons
Ultimate HDF Member
Joined: Oct 2016
Posts: 5,063
Likes: 2,582
From: On my bike!
No sir I don’t believe it will, it’s not necessarily the tune that will affect the bottom end on the M8, it’s the big open baffle design in the muffler. This is exactly why fuel moto created their insert that works in many mufflers including rinehart. I have ran many sets of slip ons on a stock M8 and while you do get some sound with the big open baffles, you will sacrifice a little on bottom. After chasing sound through all those mufflers and money I finally realized that the cam is where the sound is at in the M8. Since you want to keep your warranty you don’t really have an option for an HD cam. The stock cam in your cvo is so close to the HD 447 torque cam that it is not even offered for the 117 M8. And going back to the street tuner, the cvo comes with high flow ac and higher flowing mufflers so it essentially has the tune from the factory that the street tuner would give you.
Road Warrior
Joined: Sep 2007
Posts: 1,954
Likes: 148
From: Augusta, GA
The 4.5” Rineharts are the only ones with the black chrome finish and you will lose low end torque with them. They are also very loud and their other baffles do not quieter them down a lot. I installed a fuel moto baffle in mine to regain low end torque. If you don’t want to put on tuner, I would go with Fullsac baffles.
Ultimate HDF Member
Joined: Oct 2016
Posts: 5,063
Likes: 2,582
From: On my bike!
The 4.5” Rineharts are the only ones with the black chrome finish and you will lose low end torque with them. They are also very loud and their other baffles do not quieter them down a lot. I installed a fuel moto baffle in mine to regain low end torque. If you don’t want to put on tuner, I would go with Fullsac baffles.
Seasoned HDF Member
Joined: Nov 2016
Posts: 6,083
Likes: 6,441
From: East TN
Fullsac is the best bang for the buck. No loss on stock motor. Capable and work well on big high power motors also. They preform better than the 4.5 DBX on stock motors and on built motors
Advanced
Joined: Jun 2020
Posts: 57
Likes: 34
From: VA
No sir I don’t believe it will, it’s not necessarily the tune that will affect the bottom end on the M8, it’s the big open baffle design in the muffler. This is exactly why fuel moto created their insert that works in many mufflers including rinehart. I have ran many sets of slip ons on a stock M8 and while you do get some sound with the big open baffles, you will sacrifice a little on bottom. After chasing sound through all those mufflers and money I finally realized that the cam is where the sound is at in the M8. Since you want to keep your warranty you don’t really have an option for an HD cam. The stock cam in your cvo is so close to the HD 447 torque cam that it is not even offered for the 117 M8. And going back to the street tuner, the cvo comes with high flow ac and higher flowing mufflers so it essentially has the tune from the factory that the street tuner would give you.
But HD does offer the 447 cam for the 117.
I put it in my '18 when I changed the oil pump since it was only a couple of hundred dollars since I was already in there.
Def made a difference in the exhaust sound.
Ultimate HDF Member
Joined: Oct 2016
Posts: 5,063
Likes: 2,582
From: On my bike!
You are correct that the sound change will come from the cam.
But HD does offer the 447 cam for the 117.
I put it in my '18 when I changed the oil pump since it was only a couple of hundred dollars since I was already in there.
Def made a difference in the exhaust sound.
But HD does offer the 447 cam for the 117.
I put it in my '18 when I changed the oil pump since it was only a couple of hundred dollars since I was already in there.
Def made a difference in the exhaust sound.
Cruiser
Joined: Nov 2017
Posts: 123
Likes: 47
From: Cleveland
I have the DBXs. Didnt really notice a loss of torque. Love the sound. Love the looks. Sound wise they are acceptable to the neighbors. Just have to take it real easy.
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