This collar fits many classic 1970's Hondas, and is visually important, especially if you have already invested in a new exhaust flange. The old blackened, and heat damaged one's will really spoil the look of your exhaust header area, and you wouldn't want that, when the cost is so insignificant! For many low cost consumables, that can make the difference between a good restoration and a great one, try browsing our online 'parts list' fiche and online catalogues for you model.