THE GATEKEEPERS OF POWER > Quickest acceleration any reed can offer for that all important holeshot > Crisper throttle response making challenging obstacles effortless > More overrev so you can run a gear longer going into a corner or jump > Increased life over traditional carbon fiber reeds > The most potent reed available delivering power you can have confidence in Q: What advantage do Pro Series Reeds have over Power Reeds? A: Pro Series dual-stage reeds combine a carbon-fiber top reed with a fiberglass bottom reed for unrivaled performance. The Pro Series Reeds are more responsive than our traditional Power Reeds. The carbon-fiber top reed has excellent response characteristics that provide even quicker acceleration, stronger throttle response, and more over-rev than our standard Power Reeds. The fiberglass bottom reed provides stability and longer reed life. PERFORMANCE Pro Series Reeds are designed with the racer and avid enthusiast in mind. They offer you the latest in carbon reed technology with all the advantages of Boyesens dual-stage design. A carbon fiber top reed is combined with a fiberglass bottom reed for unrivaled performance. The unique, carbon-fiber top reed provides superior response, allowing the reeds to respond quickly and accurately to changes in engine pressure. The fiberglass bottom reed provides durability for increased life over traditional carbon fiber reeds. Pro Series Reeds deliver the largest horsepower and torque gains any reed can offer. If you are serious about performance, than these are the reeds for you! Designed in the lab, tested on the dyno, and proven at the track to assure your satisfaction. GUARANTEED Every Boyesen product comes with a money back guarantee. If you are not completely satisfied with a product, return it for a full refund.