Set Pair 2 VCT Variable Camshaft Cam Timing Solenoid Oil Control Valve VVTi Timing for Ford 4.6L 281 5.4L 330 3V with Seal an Screw 8L3Z-6M280-A 3L3Z-6C535-AA 1 3/4 Seal Older Style UPDATED DESIGN Adjusts camshaft timing for optimal engine performance Direct replacement for a proper fit every time Seals Measure 1-3/4 Inch and Fit Early VCT Systems Please measure before ordering Replaces Original Equipment (OE) number: 8L3Z-6M280-A, 3L3Z-6M280-EA, 8L3Z-6M280-B, 3L3Z-6C535-AA MUST CHECK FITMENT DETAILS TO MAKE SURE THIS WILL FIT YOUR VEHICLE BEFORE ORDERING