The original exhaust which.was used for the test runs was unsuitable for scale appearance and was also in the wrong position.
A 180 degree bend to fit within the side panels was needed. I tried a length of flexi pipe I had but this wouldn't bend into a tight enough radius. A piece of 15mm copper pipe was bent up using an ancient and crude pipe bender ( found at friend John's place ) where else, which gave the required result.
The exhaust stub on the engine is approx 22mm outside diameter although the bore is a lot smaller. An adapter was turned up to suit.
During the clear out at John's various stainless steel silencers were found which John had made at work. This one was removed from a mower and cleaned up.
This was connected to the copper pipe via an old 90 degree plumbing elbow after cleaning off all the muck. After finding a length of chrome plated pipe a posher version was bent up. No prizes for guessing where these came from. Not sure how this pipe and the plating will stand up to the heat but not the end of the world if it doesn't.
An extension was made for the silencer, again from copper pipe, as I didn't have anything else of a suitable diameter. This was drilled and the lower end plugged as per the full size. An adapter ring was turned up, drilled and tapped to hold everything together. This ring also located the assembly into the grill surround.
The completed parts and after fitting. Still need to make some adjustments.