Check the listing for details. Jet Works Jetworks Flow Control Valve 3/8 Pro series Adjustable Blue In Stock. Condition: New. Listed at 57.95 USD. This is a Great deal on a brand new Jet Works 3/8" adjustable Flow Control Valve. Introduced in 1996 the original Jetworks Flow Control Valve greatly improves bottom end response for racing or while re-applying your throttle during freestyle maneuvers. This is done by drying out your water box at low rpm and idle speeds. Without a flow control valve water fills up the water box and exhaust hoses, upon sudden acceleration all of this water must be forced out quickly before full exhaust flow can occur. This can cause a craft to feel slight hesitation and/or sluggishness, easily adjustable by turning the hex portion of the valve. Used by many, recommended by all, the Jetworks Flow Control Valve is the best and most noticeable performance upgrade for the price. IJSBA race legal. Can be installed on any aftermarket exhaust system by using the water fitting on the stinger, 3/8" Barbs.*2015 Revised version allows for lower pop off pressure. In stock and ready to ship