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- Precision cast and machined

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and other environmental factors

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BOYESEN PRO-217 BOYESEN REEDS, Boyesen Pro Series Reeds - PRO Air Filter Accessories - Precision cast and machinedBoyesen Pro Series Reeds PRO 217 Get the edge of Boyesens patented dual stage reed design plus the latest in carbon fiber technology Carbon fiber top reed and a durable fiberglass epoxy bottom reed Features the quickest acceleration any reed can offer while maximizing horsepower and torque Quick and precise response to changes in piston speed delivers smooth, dependable throttle response You wont sacrifice reed life as you might with traditional