Standard Equipment on each Rad Valve, Boyesen Dual Stage Pro Series Reeds combine breakthrough carbon reed technology with all the advantages of our Power Reeds to deliver the largest horsepower and torque gains that any reed system can offer. The super-responsive carbon fiber top reed works with the durable fiberglass bottom reed for unrivaled performance across the entire RPM range, and at all throttle settings. The Boyesen RAD valve is a solid, seamless, one-piece casting - no distortion, no inserts.

Replacement Pro Series Reeds