Tilton s flow control valve may look like a fairly insignificant part, but it s actually one of the smartest purchases any racer can make. By allowing the clutch to slip slightly during quick engagements, the flow control valve reduces shock loads to the driveline, lowering the chance of losing traction when downshifting and/or the chance of damaging driveline components. All of this adds up to fewer break-downs and less money spent on replacement parts, making the flow control valve a great investment regardless of the level or type of racing you do. Includes three orifice sizes (0.021 , 0.028 and 0.040 ) that enable clutch disengagement to be tuned. The flow control valve features AN-3 fittings for use with most Tilton master cylinders and -3 hydraulic lines.