Next comes the canister installation. We sell ply canister mounts that have plenty of material around the perimiter. The job here is to trim the mount to the right size. It should mount to the rear of the landing gear plate and also glue to the underside of the canister tunnel top. Here are beforee and after photos, and the completed setup.

This uses KS 86-4 canisters and 90mm drop headers with a flex section.

The mount is supplied with a section of silicone tubing. You need to cut pieces about 3/4" long and slip them in so the fingers of the mount go inside the tubing, the muffler is then suspended in the silicone with room for air to circulate around it.

Exhaust holes are provided to let the hit air and exhaust out, just trim away the covering. With these open you should not need to cut any hoiles in the cowl at all.

These are rear exit cans and are a touch longer than the provided holes, I will trim the rear edge and also install some silicone extensions on the tips to direct exhaust out of the plane. They also need stops against the rear of the cans to keep them from moving backwards, this is often left out and the first flight ends up with the cans disconnected from the header.