Bisson aluminum Pitts muffler for the OS 40LA, 40FP. Engine is mounted lying on its side. Inside a cowl This routes the exhaust out the bottom of the cowl.
Overall Width: 3-1/8"
Overall Depth: 1-3/4
Height (not including exhaust tubes): 1-1/4
Length of Exhaust Tubes: 2-1/2" (may be cut shorter)
Tube Outer Diameter: 3/8