QuiQue's Aircraft YAK-54 Assembly Manual page 27

Step 5
Use 1.5" stand offs for both canister
or stock muffler installation.
Step 6
You can make those stand offs from
1" hardwood dowel that can be
bought from a local store like
Homedepot. Cut them to the desired
length depending on your
installation. Soak them with CA and
let them dry. Let me emphasize that
all of the stand offs need to be
exactly the same size, otherwise
your engine crankcase will take lots
of unwanted load.
Figure 31
An alternative would be aluminum
stand offs which we recommend
over the wooden stand offs.
Figure 32
Figure 33
Figure 34
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