Putting on the hitch, I noticed the muffler has a 'bypass' pipe that goes from the front (entry pipe) to the rear of the muffler, and that about it has a small solenoid-looking thing sticking out of the bypass pipe.

 

Is this just a 6cyl thing? Is it a muffler bypass for WFO? Or some kind of a tuned resonator?

 

 

Thx-

 

Dave

yeah, it changes the muffler design based on airflow. it's got a little gate inside that rotates on a bearing set. sadly, this now validates the previously-humorous idea of "muffler bearings"...this muffler actually has some.

~Erik~

yeah, it changes the muffler design based on airflow. it's got a little gate inside that rotates on a bearing set. sadly, this now validates the previously-humorous idea of "muffler bearings"...this muffler actually has some.

~Erik~

 

Was it designed to open at high revs for more power, or is it to tune the muffler to be quieter and has nothing to do with power?

 

Sounds like the kind of thing that stops working fairly quickly.

 

Dave

Yes I think I read it is designed to open above a certain exhaust back pressure, i.e. when operating at high power output, to increase performance.

 

Sounds like the kind of thing that stops working fairly quickly.

What!?! this is a soob!!!!