Seller notes

S&S - CRANKCASE BREATHER REED VALVE Made in the U.S.A. By opening and closing "on demand," the reed valves automatically compensate for the lag time associated with accelerating the mass of air as it is forced out of the crankcase, increasing performance and stopping high-rpm oil carryover in engines with marginal piston ring seal. Installation is fast and simple; no aligning timing marks, and no rotating parts. New-style breather is not dependent on the rotation of the crankshaft to make it ope...

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