I have a F1/F2 4-1 exhaust that came with the bike for sale as I am doing a restoration on Muttley and have another Exhaust system to fit on, The down pipes have slight discolouration and good chrome and the main box has good chrome the whole system is in great condition no holes.
This is not a genuine Honda system.
I have now finally managed to upload some pictures of the exhaust 🤗