Moto Tassinari Petal Set for V Force 4 Reed Valve 4P522Replacement Petal Set for the Moto Tassinari V Force 4 Reed Valve All new design Has all new reed petal resin system, carbon fiber and lay up Pre curved reed petal ensures better seal at the tip Wider reed cage for maximum airflow Combined reed tip area is increased by 10 1 2% for better airflow Airfoil shape added to cage tip to increase velocity from the outer ports Long reed stops added to progressively slow reed petal tip velocity for increased