This spring I installed inline mufflers to quite my side swipe. There was a considerable loss of performance so I removed them. I thought that just pointing the noise backwards would help. So this week I built a quick and dirty test setup. I used a toilet flange, a threaded insert and a down spout elbow.
I removed the last portion on one end of the elbow. The inside diameter toilet flange was a little small. I used a grinding wheel to open it up a bit to match the down spout. The non-threaded part of the threaded flange fit both the elbow. I cut off the threaded section leaving a simple ring. The ring mates the toilet flange to the elbow.
I mounted the flange to my Side Swipe bracket and then glued the elbow in place.
Removing the threaded section
Opening up the toilet flange
The ring now fits the flange
Trimming back one side of the elbow
All of the modified parts
Gluing the ring to the flange
Mounted ring and flange
Now with the elbow