This Reduced-Flow Flow Control Valve has a -6AN adapter built right onto the valve. Simply replace your OEM control valve with this one to eliminate the need for an AN adapter. This one-piece design improves clearance issues that are created when a conventional adapter is threaded into an OEM control valve. Flow rate of this valve is 2.1 GPM (Recommended for Hydroboost applications and reduces "twitchy" steering performance when a Ford rack and pinion is used in conjunction with a GM Type II pump. Zinc plated steel. Made in USA