KIBBLEWHITE Manganese Valve Guide — Oversize +0.001", ID 0.3760", OD 0.5660" – 48-69, 72 Big Twin
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Precision-machined valve guides that improve valve life, accept OEM and aftermarket seals, and can be finished with common drills and a ball hone. Requires Viton® or teflon seals. Made in USA.