The Monster is everything you've ever wanted in a Reed Valve. This valve is the door to power, open the door and unleash the Monster in your engine. New from R&D with over a decade of development the low lift, high flow sixteen port Monster M-16 power valve advances reed technology into the 21st century. Improving bottom end punch, midrange pull and overall performance. Available for Yamaha, Kawasaki & Sea-Doo watercraft. Kit includes matching intake manifold and all necessary hardware.
  • Instant Throttle Response
  • Up to 20% Gain in Horsepower
  • Increased Acceleration
  • Unsurpassed Performance and Reliability
  • 100% Aluminum Construction
  • 30 Day Money Back Guarantee
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