Seller notes

Steel Breather Gear for Big Twin Late 1977 & Later Replaces OEM 25313-77A,BPart # 98-512Fits: Big Twin Late 1977 & laterReplacement for worn or damaged breather valves, Also takes the place of OEM plastic type valve. And are used with 1977 & later style diameter pinion and cam gears and large hole steel spacing shims.1215 Steel material holds up better than the stock plastic gears, and are less likely to damage the case. The metal screen offers greater protection over stock. Improves breathing c...

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