The Boyesen Rad Valve system is one of the most respected intake upgrades in the performance PWC world. Designed to maximize airflow precision, the Rad Valve uses a combination of optimized port shapes, multi-stage reed petals, and a flow-balanced intake block to improve throttle response, torque, and overall engine efficiency. Riders immediately notice cleaner low-end pull, smoother mid-range transition, and stronger top-end stability—making Rad Valves a favorite for racing, freeriding, and recreational performance builds. Stuffer Kits push the performance even further by reducing dead space inside the intake tract, accelerating charge velocity and improving mixture stability. This enhances reed response, increases low-RPM snap, and helps maintain consistent fueling under demanding conditions. Together, Rad Valves and Stuffers transform the way a two-stroke engine breathes, offering measurable gains without requiring deep tuning knowledge. Their rugged construction withstands high-RPM abuse and remains a go-to solution for serious riders. At IPDRacing.com, we carry the entire selection of Boyesen Rad Valves & Stuffer Kits, ensuring you get the perfect match for your Yamaha, Kawasaki, or Sea-Doo two-stroke.