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I believe that they are there so you dont have to pull your trim ring to add air and or check your tire pressure if you have the older style short valve stems. I know you can get the longer valve stems and just use a normal cap. I have never seen or heard of the extensions being discussed nor have I seen them for sale.
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Kim 1970 Nova Fathom Blue L78 M21 3:55 1970 Nova Classic White 454HO THM400 4:10 |
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