Hangar 9 Extra 300 ARF Assembly Manual page 24

The picture below shows how the mount looks after
silicone tubing is properly wrapped around the canister
mount.

4. Recommended header length for MTW TD75 canister
and DA-120 is 10 1/2-inches.

5 Assemble the canister/header using a vice-grip to open
the clamps and slide them over the header.
24

6. Insert the header and canister into the coupler. Leave
1/8--1/4-inch gap between header and pipe.

7. Slide the clamps over the coupler and canister and
coupler and header. Note that clamp needs to be forward
of the bump on the header to help hold the header in place
from sliding out.

8. Complete the header/canister assembly as pictured
below.

9. Slide the canisters inside the tunnel and into the
mount. Mount the header using blue threadlock and gasket.
The picture below is of the tail end of the pipe tunnel.
35% Extra 300 ARF Assembly Manual