2007 QPV 4.2 Auto Exhaust sound

[Ebenezer]

Stolen photo from the other place. View attachment 104121

Outer shell is missing but exhaust in on left out on right.

Quiet it goes through the perforations in the smaller tube does a whole loop and out the small exhaust on the right.

Loud exhaust pressure pushes the valve open it goes in the top end of the big pipe does half a loop and out the larger exhaust on the right.

Thanks for finding the pic and explaining. So both still go through the box and the wadding but the louder has a larger exit and when the pressure is higher the exhaust can escape through both pipes
Eb

 

[MarkMas]

 

[Gazcw]

Thanks for finding the pic and explaining. So both still go through the box and the wadding but the louder has a larger exit and when the pressure is higher the exhaust can escape through both pipes
Eb

Path of least resistance, so probably mostly through the larger bore.