Engine Variable Camshaft Timing Cam Phaser VCT VVTi Actuator Timing Sprocket + Bolt Ford 4.6L 281 5.4L 330 3V Adjusts camshaft timing for optimal engine performance Direct replacement for a proper fit every time Precision-machined for accurate, dependable operation Meets or exceeds OEM performance requirements Replaces Original Equipment (OE) number: 3R2Z-6A257-DA