Protruding bulges on inside of fox covers seem to be contacting valve springs. Cause no matter how high I lift the covers I can still feel contact inside the covers. Maybe it's the rockers themselves contacting
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There is a Trick Flow oil filler neck you buy seperately. You can get it with a cap, or a breather. You drill the hole and stick it in, or you might be able to find someone who can weld a neck on there for you. I like that they don't come with the neck already in them, because it gives you more flexibility to put the neck where you have the most space.